Preview drops out characters in PDF

hi
this is not a new problem to Mavericks. It is just a continuing problem even into Mavericks.
My bank sends PDFs of statements. But the PDF is not readable by Preview.
Preview drops out a character every few characters so it ends up being like gibberish.
Does any one else have this problem?
If I use Adobe Reader as default PDF viewer, then the PDF displays correctly.
I want to use Preview.
Thanks

And right you are! After posting this message I started reading through all the help files and finally did find the same answer. Now my problem is the linking as I have a very strange hosting set up. Two sites, same directory. So all my images have broken links. Something new to work out!
Cheers!
Daisey

Similar Messages

Gradients dropping out when opening PDFs in Illustrator

Hi everyone. I work for a large format printing company. We receive thousands of files every year from many different designers. We started to notice that gradients would drop out of some PDFs when opening them in Illustrator but they would preview fine when opened in Acrobat. I searched high and low for an explanation for this glitch. The only response I received is "Stop opening exported PDFs in Illustrator." This is an unsatisfactory answer for someone that needs to preflight directly in the Illustrator program. I've done a ton of research and have been racking my brain for the last 2 years and have finally found sufficient workarounds for this issue. The downfall with these workarounds: all spot colors located in the gradients will convert to CMYK mixes. I'm still researching to see if there is a way to keep spot colors intact in these areas.
A little back story: InDesign is converting the gradients into something called NChannel. It enables more accurate handling of color blending by including additional dot gain and color mixing info. Both InDesign and Acrobat have the ability to display these elements whereas Illustrator, from what I’m finding, does not. Which is why we’re seeing gradient elements drop out when opened in Illustrator.
Workaround for CMYK Gradients
Open PDF exported from INDD in Acrobat
Go to Tools > Print Production > Convert Colors
Object Type: Smooth Shade (this tells Acrobat to hone in on Gradients only)
Color Type: DeviceCMYK
Check Embed next to Conversion Profile (should be SWOP)
Expand Document Colors on the right and Select DeviceCMYK in Color Spaces then click ok
Save the PDF
Workaround for 1 Spot Color in Gradients (Converts Spot Color located in Gradient to CMYK – all other Spots stay intact)
Open PDF exported from INDD in Acrobat
Go to Tools > Print Production > Convert Colors
Object Type: Smooth Shade (this tells Acrobat to hone in on Gradients only)
Color Type: Spot Color
Check Embed next to Conversion Profile (should be SWOP)
Expand Document Colors on the right and Select the Spot that is located in the Gradient in Color Spaces then click ok
Save the PDF
Workaround for 2 Spot Colors in Gradients (Converts Spot Colors located in Gradient toCMYK – all other Spots stay intact)
Open PDF exported from INDD in Acrobat
Go to Tools > Print Production > Convert Colors
Object Type: Smooth Shade (this tells Acrobat to hone in on Gradients only)
Color Type: Spot Color
Check Embed next to Conversion Profile (should be SWOP)
Expand Document Colors on the right and Select the DeviceN spot color that is located in the Gradient in Color Spaces then click ok
Save the PDF
Please test it and let me know if you run into any issues with these workarounds. I'm always looking for new problems to solve!
- Jenny

you said--"...needs to preflight directly in the Illustrator program. I've done a ton of research and have been racking my brain for the last 2 years and have finally found sufficient workarounds for this issue"
Your workarounds seem time consuming and (possibly) unnecessary for the following reasons:
1. large format printers use 4-8 colors to achieve color (so spot colors shouldn't be an issue)
2. Acrobat Pro has it's own 'preflight' function that works fairly well
additionally (don't know if you know this) there is an add-on to acrobat called 'Pitstop' (google it) that allows just about any change/correction/alteration to be made to a PDF
...and...opening a PDF in illustrator (that wasn't created in illustrator--do you know how to determine this?) can lead to many problems i.e. gradients dropping out, text reflow, etc.
as far as testing your workarounds, seriously, who has the time when there are tools available that make using them unnecessary (this assumes that you have created these 'workarounds' to match your worflow--but a nearly pure PDF workflow should work in this day and age, depending on your RIP and software).

Why does my graphic drop out as a pdf?

I created 4 graphics in Illustrator CS3, downloaded them onto a CD cover template and saved as an .ai file which looks fine. When I attempt to then save it as a pdf, one of the graphics drops out. Appreciate your feedback.

When I click on Windows, 'Links' is not checked off. When I click on
'Links' and open the panel, all 4 graphics are listed but there are no icons to
the right of these file names.
In a message dated 2/5/2014 4:29:48 A.M. Eastern Standard Time,
[email protected] writes:
Re: Why does my graphic drop out as a pdf?
created by jdanek (http://forums.adobe.com/people/jdanek) in
Illustrator - View the full discussion
(http://forums.adobe.com/message/6086974#6086974)

Tables dropping out when saving PDF files

I have saved a document through writing to PDF in the Print dialog and also by exporting as PDF, but with the same results. In a 40 page document 3 of the tables get dropped out when saving so all I get is blank space where they should be.
Perhaps related is an interesting printing problem. When I print the entire document these same three tables are missing. But if I go back and print only the pages they appear on then the tables will print.
Any suggestions?

Happens with a Konika-Minolta Magicolor, a Brother 1470-N and an HP Laserjet.

Single letters dropping out in PDFs exported from Indesign CS

We are having font issues in some of our magazine's advertisements which proved very costly last month. First let me describe the work flow.
We designed an ad in Indesign CS then exported it using the press setting in Indesign's PDF export option. Here the ad looked and printed fine. The ad was then placed in another Indesign file which was for the layout of one of our magazines. Here the ad still looked fine on screen and when printed out from Indesign. This next step is where the font issue occurs.
When we export the the final magazine's press ready Indesign file, through the PDF press setting in Indesign again, single letters in these problem ads drop out. For example all of the Ds' in the entire ad will be missing. So a sentence in the ad that read "Dirt is Dark" will read " irt is ark."
I am wondering if anyone else has had this problem occur and if they have a solution. The only thing I can think of is in the compression settings there is an option to compress text and line art. We are going to try to uncheck that box to see if it fixes the problem.
Thank you for you help,
Javin.

I realized, of course, that it does make a difference. If you don't have the fonts on your system, a frequent issue with incoming ads, you couldn't embed the full font at all. You need to be sure that ads generated in CS have fully embedded fonts, not subsets, or risk dropouts. It will only happen when more than one ad uses the same font, but different glyphs.

Transparency Layer Drops Out of PDF Export

I have an InDesign CS3 layout. I have placed grayscale tiff at 100% as the background, and I have a small image in the foreground covering about a 1/4 of the background image, screened back to 40%.
When I export to PDF at "Press Quality", the small screened image appears fine. But when I export to "Smallest File Size", the foreground image drops out. Why is this happening?

I think we need a screen shot...

Preview Files Suddenly Go Missing, Render Entire Work Area Crashes Premiere, Audio Drops Out

I opened a Premiere Pro project I was working on earlier today and it said it couldn't find the preview files, searching my system found that the files didn't exist.
Rendering my entire work area brings up the "render window" but nothing happens, if I press cancel Premiere freezes.
Started getting a strange situation error ( 26 ::139 ) in After Effects at the same time that Premiere lost the preview files and the crashes started happening. It disallows me from editing any dynamically linked projects. In Premiere the DL's just show up as "Media Pending" clips indefinitely. Importing the compositions in AE into a new project didn't fix the issue either.
The three problems above started happening all at the same time, was working through a color grade using Red Giant software when it started happening.
Also audio drops out on playback randomly in Premiere Pro, tried various audio drivers and hardware, none entirely eliminate this problem. Sometimes the audio will cut out and "burst in" distorted very loudly, which is disturbing, even when my work area is rendered. This problem has been around since I started using PP CC.
I can provide more info soon or if people want more info pls let me know, I'm very tired and I need to get this issue resolved for tomorrow, in the mean time hopefully someone can point out a general fix for these errors or knows a few workarounds. Tried reinstalling PP and AE, no luck.
Computer is a Windows 7, 64-bit. i7 950, 12gb RAM, GeForce GTX 650, programs installed on a separate internal HDD, media files on another internal HDD. But these same issues (minus the audio dropouts) was also cropping up on a core 2 duo 13'' macbook pro.
Regards,
Zach

Hi Arjun, thank you for your help.
Though that didn't work either. At least the timeline will playback but as soon as I try to render my work region or export any video Premiere freezes.
I removed all dynamic linked files as well, that didn't seem to change anything.
Something I noticed -- the render bar on the timeline that is usually yellow for edited clips that have no FX on them is all red, nothing is yellow (or green). This is a 4 minute long edit on a music video, nothing extraordinary.
I tried creating a new project and dragging a few clips in and editing them, everything went normally and I could render and export the clips. Just any rendering done on any version of this music video edit I'm working on crashes the program.
Also recently had a problem where I opened the music video project and the song that I imported (.mp3) all of a sudden has no waveform or sound coming from it. Dragging it back into the project doesn't fix it either. Workaround was using a .wav copy of the song.
Zach

ColdFusion 8 drops Arabic characters when generating PDF doc

Hello All,
Please let me know what I'm doing wrong here! I have trouble with generating a PDF document from ColdFusion.
The cfm document contains mixed English and Arabic text and it seems that the ColdFusion's embedded PDF Generator drops Arabic characters when creating the PDF file.
I attached a bare bone cfm document (see print_test.cfm) that I used as an example to the stated problem.
The document:
displays fine in FireFox 3.0.10 (see attached print_test_screenshot.jpg) Used link:
http://localhost:8500/Print_test.cfm?display=yes
This image file also shows the characters that get dropped by the ColdFusion's embedded PDF Generator.
is converted fine in PDF by the FireFox 3.0.10 using print command line (see attached print_test_firefox.pdf) Used command:
“C:\Program Files\Mozilla Firefox\firefox.exe" -print "http://localhost:8500/Print_test.cfm?display=yes" -printmode pdf -printfile "c:\pdf\print_test_firefox.pdf" -printdelay 150
is NOT converted to PDF properly by the ColdFusion using the embedded PDF generator (see attached print_test_cf.pdf) Used command: http://localhost:8500/Print_test.cfm
The print_test.cfm file, which I had to remove since this forum allows me to post only 3 attachments, has the following content:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<cfsavecontent variable="MyPage">
<head>
<title>PRINT TEST</title>
</head>
<body>
<table width="810" border="0">
<tr>
    <td width="225" ><div align="center"><strong>ARABIC TEXT PRINT TEST</strong></div></td>
    <td width="225" ><div align="center"><strong><span dir="rtl">نظام بصمة الوجه في دولة</span></strong></div></td>
</tr>
</table>
</body>
</html>
</cfsavecontent>
<cfif not(isdefined("url.DISPLAY"))>
        <cfdocument format="pdf" filename="c:\pdf\print_test_cf.pdf" overwrite="yes">
        <cfoutput>#mypage#</cfoutput>
        </cfdocument>
    <cfelse>
    <cfoutput>#mypage#</cfoutput>
</cfif>
Thank you all for your help,
Adrian

"I suppose you did it through the cfdocument tag in a cfm document". nope i used
the iText library (the one that ships w/cf) directly in cf to see where the
problem actually was. i don't think this is something you want to do?
i reported this as a bug to adobe, you can help get something done by adding
your own bug report here:
https://www.adobe.com/cfusion/mmform/index.cfm?name=wishform&product=12&6213=6
================ the cf file i used ================
// file
thisPDFFile="c:\Inetpub\wwwroot\iText\arabicLigatureTest.PDF";
// get objects
pdfFile = createObject("java", "java.io.FileOutputStream").init(thisPDFFile);
pageSize = createObject("java", "com.lowagie.text.PageSize").init();
bidiTable = createObject("java", "com.lowagie.text.pdf.PdfPTable").init(1);
//one column table
phrase = createObject("java", "com.lowagie.text.Phrase");
baseFont = createObject("java", "com.lowagie.text.pdf.BaseFont");
Font = createObject("java", "com.lowagie.text.Font");
Phrase=createObject("java", "com.lowagie.text.Phrase");
// landscape to fit this map image, the rotate() bit
//pdfDocument = createObject("java",
"com.lowagie.text.Document").init(PageSize.A4.rotate(), 0, 0, 0, 0);
// portrait
pdfDocument = createObject("java",
"com.lowagie.text.Document").init(PageSize.A4, 0, 0, 0, 0);
tableCell = createObject("java", "com.lowagie.text.pdf.PdfPCell");
PdfWriter = createObject("java", "com.lowagie.text.pdf.PdfWriter");
PdfWriter.getInstance(pdfDocument, pdfFile);
// add metadata BEFORE opening pdf doc
pdfDocument.addTitle("This is a quick and dirty arabic ligature test");
pdfDocument.addSubject("arabic ligature PDF test");
pdfDocument.addAuthor("PaulH");
pdfDocument.addCreator("arabicItext testbed");
pdfDocument.addKeywords("CFMX and iText are a great combination by golly!");
// lets setup unicode font
msUnicode=baseFont.createFont("c:
windows
fonts
ARIALUNI.ttf",
BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
thisFont=Font.init(msUnicode,12);
// open doc to add stuff to then close, duh
pdfDocument.open();
bidiTable.setWidthPercentage(100);
bidiTable.setRunDirection(PdfWriter.RUN_DIRECTION_RTL);
// leading, text, font
arabicPhrase=phrase.init(2,"نظام بصمة الوجه في دولة",thisFont);
c=tableCell.init(arabicPhrase);
c.setArabicOptions(8); //
c.setBorder(0);
c.setGrayFill(5.00);
bidiTable.addCell(c);
for (i=1; i LTE getU.recordCount;i=i+1) {
     arabicPhrase=phrase.init(22,getU.uniText+,thisFont);
     c=tableCell.init(arabicPhrase);
     c.setArabicOptions(8);
     c.setBorder(0);
     c.setGrayFill(5.00);
     bidiTable.addCell(c);
pdfDocument.add(bidiTable);
pdfDocument.close();
</cfscript

Colors dropping out of a 2 color job between reader version 8 and 10

We're having an issue displaying colors correctly between versions.
We have distiller 8 windows, creating a 2 color pdf. When I open it on my XP PC running reader version 8, everything looks great
When another user running an XP PC opens the pdf it looks fine, but when you go to print it, the second color drops out of one of the images on the print preview screen. this person is running Reader version 10.0.1.
When another user opens the pdf the color is dropping out of both the pdf itself and the print preview. We do not know what version that user is using.

Also, the pdf looks fine on my Mac opened in Preview.

Airport Extreme dropping out and can't connect PC anymore

Hello
Suddenly, a couple of weeks ago, my internet connection dropped in the middle of surfing. I couldn't reconnect, Airport was only seeing the base station spasmodically and when I did try to connect I was being asked for a password which wasn't recognised. Hours later I called the support line and was advised to do a hard reset which I did, new name, same password. Now I'm reconnected most of the time, but it has dropped out a few times and the signal seems generally weaker. Something's not right.
I had not at that point done the July 1st update so it's not to do with that. I haven't a clue why it suddenly started playing up so strangely. (Though I have noticed a new unsecured wireless network in range and wondered if someone was 'hacking')
My main problem is that my business partner, who connects through a pc here (who remained connected incidentally when I first lost the connection) and continued to be able to connect until I did the hard reset. Now I can't connect that pc to the airport extreme. It sees it but gives an error message saying it's out of range and refresh the list when I try to connect. I fiddled about for hours. I've forgotten how the pc was set up in the first place and I'm going nuts. Can anyone help.
Thanks
Helen

Disappointed not to see any help on this one.
If it helps anyone out there to help me, I just uploaded the Airport Utility Software to the pc, typed in base station ID and password. Error message, check network connections. No help.
Try to connect the pc again the usual way from the list of available networks, it asks for password, I use it, then it says it needs to be 5 or 10 ASCII characters or 20 hexadecimal.
What I don't understand is that everything was working fine on both machines until two weeks ago when my base station went into spasm, dropped me but happy with pc, when I did the hard reset, keeps me, won't allow pc to connect.
I just don't know what to do now. Of course I suppose I could always make a call and pay £35 to have an apple technician tell me why their hardware suddenly screwed up for no apparent reason.
Seriously frustrated
Anyone?

AirTunes with AirportExpress cut or drop out problems - my solution...

I buyed 2 of the Airport Extreme one month ago (Firmware 6.3, Itunes 7.1.1), never got them working fine, till yesterday...
I have A Zyxel ADSL WLAN Router Switch. WPA-PSK as I wanted a secure Network. Both of the AX were connected with static IPs. WLAN was always working fine, but I had many cut outs with airtunes. I wanted a solution with lossles streaming audio with the possibility to connect my Receiver digitally. That's why I bought my first Apple hardware, as I was always told, Apple=Plug'n play. Very frustrating!
I tried other switches, Routers, WLAN adapters and cards, nothing worked. Airfoil does not support multiple speakers yet, so it's useless for me.
In the FAQ of the Airtunes, Apple mentioned to use lower security, as some Computers probably do not have enough power to stream music flawlessly. But my Computers really do have enough power! I think the AX does not have enough power to do that. So I created another wireless network with one of my AX. I set the security to WEP-40bit key and joined this new Network with my other AX. Not the best solution, as I'm now connected to the Internet or to the AX to use Airtunes. Cables could fix that problem, but then I could use a wired system instead...
I use Channel 11 for the AX WLAN (the only clean channel in my area), Multicast to 11, only G mode for Wireless and a 5 characters WEP-40 key and no WDS. Seems to work at the moment.
I hope this will help others with the cut or drop out problem. If you have a working AirTunes system, please post your setup. Mostly I'm interested in a Setup with working WPA...

Thanks, I hope I can help others with this annoying problem...
Sorry, I forgot to write about the RF Interference. Belive me, I spent hours and hours searching for a solution in the Internet and every checkbox the Admin utility offered me to try out... I'm working as a system engineer, and supporting computer systems since the early 90ties, so I'd say I have a bit knowledge about all the networking, WLAN, Audio... In school we had the Apple Mac I with the 12" monochrome monitor and appletalk for networking quite funny!
But back to the RF interference: At the moment I activated it on both AX I own. I have a microwave, wireless phone and I'm living in a Area with many WLAN access points. I can choose between 6 networks!
I'm the only one with a network higher than channel 6, so this area is clean at least.
As my AirTunes do work at the moment, I'm not going to try if I could also deactivate it.
Next step is to try if I can connect the AX Router to the internet. A connection to my ADSL router should do that, but up to now I had very strange behavior when plugging in a ethernet cable to the AX. If this will work, it will be my final solution, at the moment I only see it as a workaround...

Drop out/pixillation on DVD

Hi,
I am producing a DVD with 9 short films on (length 4 mins to 14 mins).....all shot on HDV and edited in Final Cut, I have exported all the films to Quicktime movies (not using conversion) and then created DVD using iDVD, all previews fine in iDVD etc but 3 of the films have bad drop out/pixillation at several points once burnt onto DVD....while the other 6 films are all fine.....I have tried different burn speeds.....
any ideas very very welcome, as I supposed to deliver the DVD on monday....
I do have DVD Studio Pro, but no idea how to use it and the thought of trying to learn that at this stage before monday is scaring me!....especially as may end up with same problems....
Cheers

No the sequences seem to be random....no particular fast moving bits or significant effects.....have checked VOBs with Streamclip and they are corrupted, so its definitely not the players....however tried making an MPEG 4 file with Compressor, as I had read iDVD accepted them....and put it onto DVD...works fine, no drop out at all....(although it has lost widescreen and squashed it into 4:3!)....and unfortunately quality is not good enough for the DVD.....
so will try MPEG 2 now, and see if that works in iDVD....otherwise it looks like an all night learning DVD Studio Pro....no bedtime stories for the kids tonight! Unless you have any other ideas.....all very gratefully received.....
Cheers

Full screen preview drops frames

Hi all,
A continuation of the thread I opened here (with hardware specs for information):
http://forums.adobe.com/thread/657008?tstart=0
Whilst I resolved the tearing issue secribed in the previous thread I still can't get smooth playback on the third full screen preview display and I'd like some basic advice as to what I could do:
A couple of things I have tried - firstly I tried a basic sequence with a spinning graphic (in order to rule out any issues with disk/network access), and then also tried two screens rather than three (so only one graphic card was in operation), a 60p/30p project with screens set to 60Hz and a 50p/25p project with screens set to 50Hz.
All to no avail - the full screen preview drops frames, especially with 50p content - 25p is better but every 20 seconds or so frames are dropped. Audio is always fine, regardless of the source, BTW.
As a reminder, this is a 12 core i7 with 2 x Quadro FX3800, all unnecessary services disabled, 12Gb RAM, CS5 5.0.3, latest WHQL Nvidia drivers.
Not sure if 5.5 improves this in any regard as I'm still waiting for my licence key.
Video playback outside of premiere is perfect, 1080p50 plays fine full screen on any display through windows media player/VLC.
Any suggestions please - again I wonder if a Blackmagic Intensity or similar would help?
Has anyone else seen this behaviour? Could anybody have a go a reproducing the issue (a simple spinning or sliding jpg demonstates the issue easily and simply)
Thanks all
Sacha Goodwin.

There exist no 12 core i7's. The max is hexa-core, but in your previous thread you said Xeon X5670. So what is it?
Well spotted, my bad - it is indeed 2 x hexa-core X5670's - which of course is 12 cores in total.
I still suspect your Editshare NAS.
I'd say unlikely since - we've replaced it with something else, also:
I tried a basic sequence with a spinning graphic (in order to rule out any issues with disk/network access)
and at any rate I tried it as a local project on local disks and it made no difference.
For graphic read plain color matte and basic SD res JPG (same results with either)
What happens when you increase memory to 24 GB?
No idea as I don't have access to any - strikes me as odd though to think anyone would need 24Gb or RAM just to display a rotating still smoothly.
Premiere is showing 300Mb of RAM, total RAM in use when everything is loaded and running is 3Gb, 9Gb free sitting there twiddling it's virtual thumbs.
BTW I should also mention that this happens even on SD projects, not just HD ones. Also watching the task manager shows virtually CPU usage, no disk and no network access during playback (as I would expect). No peaks in any graphs correllating with the dropped frames. Also enabling/disabling MPE Hardware assist makes no difference.
Sacha.

Can't show special characters (ÆØÅ) in pdf fields created with inDesign CS6

Hi Guys im having a problem with special characters in pdf's form fields created in inDesign CS6
instead of the character ÆØÅ it creates squares or some other seemingly random character
Here's the pdf

I figured it out
Just in case people had the same problem here is how it's done: (i misunderstood the two posters above me, so you are actually going to change fonts within acrobat, like they said, and save it)
Open the pdf in acrobat, go and change font settings for each of your fields and change the font under the "Appearance" tab.

Preview Highlight "Garbage" characters

I have a fairly strange issue.
I am using Mac BookPro 15 Retina, OS X 10.9.4 (latest update check 16.Jul.14), using Preview app version 7.0 (826.4).
I use Preview for reading all my PDF'es. And I highlight the text, underline, draw speech bubbles, arrows, boxes, etc
I have no problem so far but except one single PDF which is not behaving well.
The issue is this :
I click on View > Highlight and Notes to open up the left-hand side pane (in Preview)
I highlight some text and immediately the left-hand side pane will show the page number and the first few words of the text that I highlight plus the time stamp
This is fine at the beginning
But after using it for a while (which I do not know the exact timing), the highlighted text on the left hand pane start to show garbage character
Not ALL the text I highlight from now onward are garbage, some are still readable text, some are garbage. And there is no fix pattern. I will not know if it is good or bad until I highlighted on it
I did some text, copy the text out to TextEditor, and it show garbage as well, trying to change the font (at TextEditor) does not help too
Bring that PDF to another Mac has the same result
So I download that PDF from the source again and highlight the same text to prove that it is not "corrupted" at source. It is confirm that the text was readable when it is downloaded. But the PDF that I have been modifying results in garbage when I highlighted it and paste to TextEditor.
I have tried to re-download the PDF at least twice and I am still facing the same issue
I ran Font Book app and did a quick check and do not find anything that is invalid. Though I don't really know how to use Font Book app to troubleshoot for this matter.
The above 2 screen shots refer to the same passage in the "bad" PDF. You notice that the second image show the text is not garbage but when you highlight the entire paragraph, it become "corrupted"
The above image shows what happen if I copy and paste to TextEditor.
The frustrating part with this issue is that it only happen to this PDF and the problem occur after using for "some time".
Apologise if I did not narrate the problem clearly.

Hey!
I don't know if you already solved the problem but I came accross with the same issue and found a quick fix. First there are many threads with this topic as old as from 2007. In any case, it seems it has something to do with embeded fonts, and is nearly impossible to fix that. Although there is somebody proposing to save it as TIFF and then using OCR to recognize the text and put together all those TIFF generated pages. I did try that fix once but it was time consuming and I gave up. Anyway, today I just found a fix based on that recommendation. This one gets the TIFF in the same application without having to save different files. These are the steps.
1. Open the file with PdfPen (http://smilesoftware.com/PDFpen/index.html). I have the pro version but the free version also has OCR.
2. Go to File>Save as...
3. Select: Format>TIFF (print, 300dpi)
4. Save. It will save a file with the same name but TIFF
5. Open that file with PdfPen
6. Select the first page of the document in the left side of the window and press command+A to select all the pages
Ok, this is a bit tricky, just follow me
7. Go to Help and type OCR, there will apper "OCR Page" and "OCR Document"
8. Move your mouse to "OCR Document" and an arrow will show you where to go. Go there while it is saying "OCR Dcoument" and click
9. Wait depending on the size of the document
10. Go to File>Save as... Choose PDF (it will be already selected) Save and enjoy!
Now you can open the file in Preview and select text and copy it.
This may seem a long process but its not. I just wanted to be descriptive. Just be carefull in step 7. I do not why but when I go directly to Edit> it only appears OCR Page. That is why I went through Help>OCR... anyway, you got the idea...
Hope it helps an let me know if it works!

Preview drops out characters in PDF

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