IPhoto doesn't update to modified pics after force quit

Question

iPhoto didn't respond to my 'quit' command, so I chose to +force quit+ it. Before I did so, iPhoto had a problem connecting to Facebook, which seemed to cause iPhoto not being able to quit (this happened to me several times recently, and I always had to end up force quitting iPhoto). Every time I clicked on an album under FACEBOOK on the left column of the iPhoto application window, an error message came up saying +"Facebook authentication with server failed. Please check your login and password information."+ I thought perhaps stopping iPhoto from syncing with Facebook would help, so I +removed my Facebook account from iPhoto+, in an attempt to set up the connection again where I would re-enter my login and password information.
However, after this, when I clicked on a photo and then clicked the Facebook botton on the bottom right corner, then clicked *Set Up* in the message box to +set up iPhoto to publish to Facebook+, the Facebook login box never completed loading (it was all white and plank besides the loading bar on the bottom which never exceeded loading more than about 12%). I waited for more than half an hour and the loading didn't process any longer, so I closed the box. I tried this for several times in the next few hours and the same loading problem came up each time.
In the mean while, the Faces under LIBRARY in iPhoto had an +updating circle+ next to it which seemed never able to end the search. So I did some search over the Internet to find solutions to the problem, and came across with this: _http://discussions.info.apple.com/thread.jspa?threadID=2444899_.
The problems now were that 1) iPhoto could not load me to the Facebook login page for me to re-enter my Facebook information for iPhoto; and 2) iPhoto could not quit.
Because the solution posed on the above link has a first step of "quit iPhoto", so I force quitted iPhoto and followed the 1) to 6) processes stated in that thread (i.e.: removed ~/Library/Caches/, ~/Library/Preferences/com.apple.iPhoto.LSSharedFileList.plist, and ~/Library/Preferences/com.apple.iPhoto.plist to trash; deleted iphoto.apple.com inside Keychain Access; restarted computer; and launched iPhoto again).
This time I could come to the Facebook login page on iPhoto, and quit iPhoto for no problem. However, I now find that some of the pictures I edited within iPhoto before force quitting do not show the modified versions when I open them, even though the +modified versions+ are shown in thumbnails and they can be located in +iPhoto library+ (~/iPhoto Library/Modified/year*/album name/picture name*). The other weird thing is - the problem does not occur to all photos I edited before force quitting (e.g. for two photos I edited one after another, one has the problem and the other does not).
I did some search over the Internet before posting this message, and found one to be a possible solution to my problem: _http://discussions.info.apple.com/thread.jspa?threadID=2771968&tstart=15_
Nevertheless, I'm a bit resistent to downloading +iPhoto Library Manager+ in thinking of the down sides of doing so, if there are any. What would be the best way to solve my current problem? How could I get iPhoto to recognize and link to the modified photos instead of the original files? By the way, I did not have this problem before force quitting iPhoto.
Thank you in advance for all your inputs!

Answer 1

i'd like to keep all modified files because it took me quite some work to edit the pictures
Then recover them from the damaged Library and import them to the new one. That said, remember they will be treated as "new" photos, not as edited versions of the others. There is no way to recreate that link.
1) Would it be bad for me to keep working with my old iPhoto library?
This library is corrupted. It is known to be damaged. The chances of dataloss are greatly increased. You will have more problems. Personally, I wouldn't.
2) How to *back up*? And I assume it should be conducted regularly?
*Most Simple Back Up:*
Drag the iPhoto Library from your Pictures Folder to another Disk. This will make a copy on that disk.
*Slightly more complex:*
Use an app that will do incremental back ups. This is a very good way to work. The first time you run the back up the app will make a complete copy of the Library. Thereafter it will update the back up with the changes you have made. That makes subsequent back ups much faster. Many of these apps also have scheduling capabilities: So set it up and it will do the back up automatically. Examples of such apps: Chronosync or DejaVu . But are many others. Search on MacUpdate
*I'm Serious about Back Ups.* +And you should be too.+
My Library lives on my iMac. It’s Backed up to two external hard disks every day. These disks are permanently attached to the iMac. These back ups run automatically. One is done by Time Machine, one is a bootable back up done by SuperDuper
It’s also backed up to a portable hard disk when ever new photos are added. This hard disk lives in my car. For security, this disk is password protected.
I have a second off-site back up at a relative’s house across town. That’s updated every 3 or 4 months.
My Photos are backed up online. There are many options: Flickr, Picasa, SmugMug etc. However, check the terms of your account carefully. While most sites have free uploading, you will often find that these uploads are limited in terms of the file size or the bandwidth you can use per month. For access that allows you to upload full size pics with no restrictions you may need to pay.
Every couple of months I test the back ups to make sure they are working correctly. It’s very easy to mis-configure a back up application, and the only way to protect against that is to do a trial restore.
3) Should I un-do the removal of ~/Library/Caches/, ~/Library/Preferences/com.apple.iPhoto.LSSharedFileList.plist, and ~/Library/Preferences/com.apple.iPhoto.plist, as well as the delete of iphoto.apple.com inside Keychain Access?
No.
Regards
TD
R