According to BertH Wikia is undergoing scheduled maintenance with respect to file uploads. Please hold tight; normal service will resume soon.
That is correct, and the maintenance ended at around 1:30 am US Pacific time. Upload functions are fully restored. If anyone is having a problem uploading, please report the details to us via Special:Contact.
Since Wikia can do Wikia wide announcements, it would have been nice for things like this. Then again, those announcements can be annoying, so I guess it's a Catch-22.