Hi, I have a strange problem. I had to restore my complete server last night with the psadump backups. It actually restored well !! However ... on almost every Gallery install in several customers accounts .. there are thumbnails missing (physically on disc). But even more strange is: not ALL thumbnails are missing .. just some of them ... and i had to rebuild a lot of albums manually. It all are custom Gallery installs .. not the Plesk Application pack Gallery versions. Just a standard Gallery install (following the manual). All files are written by Apache with group and userid 'apache'. So what could be the cause of this problem ??