After setting up my images in their albums, if I go back to an album, the titles no longer show up on the admin page. If I then edit an image, add a description let's say, and hit "save images", ALL of my image titles disappear from the web pages.

Which web browser and build of zenphoto are you using?

Safari 3.1.2 Mac OSX and zenphoto 1.1.7

Are you clicking the "Save Images" button before going back to the admin page? Can you describe the exact steps to take to reproduce the problem?

I cannot reproduce it with the same setup, so details as krainbolt said would be welcome.

Perhaps I can add some more information because I ran into the same problem.

1. Upgraded from 1.1.7. tot 1.2.1. with no problems. Played around with moving images, and all previously entered data was kept intact.
2. From within one album I deleted and moved all the images to other albums. Then I tried to delete that empty album but got a php-warning which I forgot to copy .
3. I deleted the empty album manually by ftp.
4. Now, when I add or change a title from within my website, on the spot as it where, the new title is saved. I can change pages and it is still there.
5. When I go the that same album in the admin-section and change the title from there (or the description) or just do nothing and hit 'save changes', ALL the information (titles+descriptions) of all the images in that album are gone. When I view the album on my website I can only see 'add title' under the first thumb.
6. This happens to all the albums.
7. I purged the cache, refreshed the database, refreshed metadata, refreshed hitcounters etc., but nohting helped.

The only other thing I did was play with the multilanguage feature for a few minutes, so activated and deactivated the 'dynamic locale'. As a plugin I'm only using the printalbummenujump().

Any idea?

Edit:
Now it's working again... I ran setup.php again, closed my browser and now it seems to working again. Beats me why it didn work before. I'll keep an eye on it because I have to do al lot of moving and renaming the next few days