Missing Images in WebHelp (RH6)

Question

I have built a WebHelp guide of 130 topics. When I first
start to view it, all is well. I stepped through several topics in
the Browse sequence, all OK. I used the Search box and found a few
topics. Selected OK. Then select the Index tab, then Contents tab,
and then the problems start. ALL the larger images fail to appear.
The white space is there on the screen, but no pics, and these are
a mix of GIFs, animated GIFs and PNGs. Most of the smaller images
(say, smaller than about 150 x 250 px) appear OK.
(I am viewing these in IE7, running under Windows XP with all
latest updates; fast Pentium 4 + 1.5Gb RAM, hot 256Mb graphics
card).
If I right-click on a missing image, and select Properties,
it shows the filename, but the file size reports "-1bytes".
On one occasion, I noted that the progress bar at the bottom
of the IE7 screen was stuck trying to load images, and some of the
skin graphics ewre missing too.
If I close the WebHelp and load it again, everything works
OK. Until I repeat this sequence.
Has anybody got any ideas? This problem happened on another
computer, so it's not just this one.
H-E-E-E-E-LP!!

Answer 1

Hi Leon and Harvey,
Thank you for your observations and thoughts.
1. Copying images: Investigation. Open a topic in RH and
click on an image in the WYSIWYG tab. Now switch to TrueCode view.
You can see highlighted the exact code that it will copy. Example:
<img src="actions1.gif"
x-maintain-ratio=TRUE
style="border: none;
width: 319px;
height: 204px;
float: none;
border-style: none;
border-style: none;"
width=319
height=204
border=0>
--- (The code should be indented as in TrueCode view, but
this forum page does not support tabs or multiple spaces).
So, clicking on an image in WYSIWYG correctly picks up the
filename reference, aspect ratio, exact size, borders etc.
- Copy and paste this text to NotePad, so you can refer back
to it in a moment.
- Now return to WYSIWYG, click on the image and use Ctrl_C
copy.
- Switch to another topic and Ctrl_V paste the image
somewhere convenient.
- Click on the image, and look at the TrueCode page.
The code has copied across exactly as on the original topic -
compare with the code in NotePad.
Now save the topic (you can delete the image later).
Next, select the Project tab, bottom left. Look in the Images
folder and find the image you just copied. Double-click to open the
Image Properties, and select the "Used In" tab. You can see the
image correctly registered in the two topics.
Conclusion: Copying and pasting images takes the exact code
from one topic and pastes it into another; so I do not understand
why there should be a problem; these are only HTML web pages, after
all - unless there's a bug in the RH background database
interfacing?
2. Resizing images: Although it is possible to drag the
corner of an image to resize it, I teach people not to do this, as
the image quality suffers badly, and it renders the image
unreadable sometimes. I resize in Paint Shop Pro if I must; but
prefer to take a cropped area of a real-scale screenshot if I can.
The RH Help Guide claims that RH supports PNG; and why not?
It's just an HTML web page. Something is deeply wrong somewhere if
this is happening... The mystery remains: is it just a PNG
problem?