Hey, I'm having the same problem, I think it stems from the new underscore in the file name "upgrade". If you make file names with spaces in the past, Coppermine uploaded them fine. However, now it's a different story:
- old uploaded files look fine via thumbnails until you click to view full image, then you get a little empty box
- new uploaded files are somehow converted to underscores and thus the albums/pictures view fine
Try FTPing one file into an older album, and then go to "Batch Add". See if all your pictures are marked as "new" and to be uploaded?
I opened a thread for this earlier {http://forum.coppermine-gallery.net/index.php?topic=26700.msg123052#msg123052} and have been arguing with my host over upgrading/updating Fantastico since then. (I'm doing my upgrade manually now, but ran into an error.)
I don't think upgrading to a new version will help, unless there's some script that will change all your filenames to underscores and "fix" the links in the albums?
Also, if you go ahead and let the Batch Add "fix" the underscore problem by re-adding all your pictures, in every album and category in your gallery, you then have an entire duplicate set of thumbs and empty pictures to get rid of, which also resets all your view counts. Not anything major, but for me that's about 7,000 files in one gallery alone, not to mention my other gallery installs!