If there is another site that can host rotating avatars, then you can. Did you upload your images via imageshack or something alike? Your images should still be there and can be in use for other things.
It doesn't have much use to Report this problem to Mario Wiki, as they have nothing to do with it.
I mean, it's like calling your local Hotel, because you've got problems with your Mobile Phone.
Going from the tone of the OP, she didn't intend to report the problem though, only to ask other people if they experience the same problem and if they know any details.
It's like calling your friend and ask them if whatever your mobile phone is doing right now is normal, or if you should invest the time and effort to get it repaired.