Hallo,

first of all, thank you for a great photo gallery.

I encountered a problem with thumbnails after moving my zenphoto gallery to another server. Previously, everything worked fine,
but now when I open any album, I see a "broken" thumb,
but the image itself shows correctly.
Web site is: http://volodin-fest.ru/photo/volodin/1960-1980/

Could you please help me with that?

Thank you in advance

Please take a look at these bug report guidelines (most important: Look at your server error logs):
http://www.zenphoto.org/news/general-contributor-guidelines/#reporting-bugs

Also please take a look at these common image problems:
http://www.zenphoto.org/news/problems-with-albums-and-images/

Hallo,

ok, thank you,
the problem was with File permissions of cache directories.
Changing it to 777 solved the problem.

777 should really not be necessay constantly as it is wide open to anyone basically
http://www.zenphoto.org/news/permissions-for-zenphoto-files-and-folders/
If you really need 777 constantly on that you might need to talk to your host about that.