This was posted by an admin at the photobucket forum, should be temporary:

Hi guys, I posted an announcement last night and have been updating it. There was a problem with one of the disks arrays last night. Unfortunately it is taking a really long time to do a filesystem check. 90%+ of the albums are up but it might take a little bit to get the remaining back up. I can't speed up the process as it needs to do its thing.