I duplicated a theme and it was copied with chmod 777 all over. Now when I try to change the permissions with my ftp client it's not permitted. I also tried by cpanel. I'm wondering if this is a server issue. But I never had problems to change permissions before.

Thank you for advise!

Well since Zenphoto is not the purveyor oserver security I would have to presume it is a server problem. Basically what seems to have happened is that Zenphoto is running on a different user than your FTP and your FTP user does not have master priviledges.

That would mean that I couldn't change permissions of any folder. But it only affects the duplicated theme folders.

I gonna contact my host as well. But if anybody has another idea...

More likely it only affects folders that Zenphoto has created which would include (but not be limited to) duplicated theme folders. Anyway, as I said, Zenphoto does not manage security on your server. If somehting is not working correctly it is a server configuration issue.

As my host didn't replied yet, I resolved it by copying the theme manually via ftp.
No problem anymore.

Thank you sbillard