All I get are little teeny white boxes instead of thumbs. When I click on one of the little boxes, then I can move on to the image page. But the Thumbs don't come up on the album pages.
I set up three new sites with the latest version of ZenPhoto, and I had the same issue on all three. I did a lot of messing around trying to "fix" whatever I'd done wrong with the templates. I uploaded a "pure" version of the zenpage template into my lemons folder and it still wouldn't work.
Finally I uploaded one of my custom templates from version 1.4.2 and THAT works fine. The album thumbs and everything work fine. But not with a custom 1.4.3 zenpage template.
If I change the folder name for the 1.4.3 template to anything other than zenpage, then the album thumbs disappear. I've messed with this enough that I think I've confirmed a bug.
And, one other thing... I also MUST use the ZenPage name in the Theme Description file apparently. I haven't been entirely able to research this one, but Adsense was not working on all my pages until the NAME of the theme was changed back to ZenPage as well. Adsense worked on Albums but absolutely would not come up on Image or Gallery. It seemed that all my template problems disappeared once everything was "ZenPage."
And a third thing: I'm getting persistent errors that my passwords don't match. When I save things. The items I'm saving ARE saved and the changes ARE applied, but it pops up with this error about half the time. I tried "reverting" the security feature but that didn't help.