I've found the tag quoll on a pic and, don't knowing what that means, searched it, but it always produces a maintenance-message. http://www.e621.net/post/index?tags=quoll

Ok, the wiki-page works, so I know what it is now. It might not be the most important tag, but maybe some others are affected too?

Umm... Works fine when i search it.

Hm, I just had to refresh the maintenance-screen, now it works again.