I had a working zenphoto for some time.
I installed the new zenphoto, and now the indexpage is showing up ok, but when I click a thumb there, I get an error. The album wont show

You can see for yourself here: www.detoverboom.be/zenphoto

thanks
gaga

woeps....
seems to be working now...
Was trying different things in the adminpanel... do not know what did the trick

[glad]

Probably you turned off the mod_rewrite option. That is the most common cause of problems like you described.