I changed the preferences, so the maximum size for an animated avatar is 25K. Normally, the largest permitted avatar size is 3K.
80x80, still. If there's an image that you want to use badly enough, mail it to cyburbia (at) cyburbia.org, and I'll resize it.
Again, ONE WEEK ONLY! Can't be having animated graphics everyday, you know ... maybe just for special occasions, like four day work weeks in the States. Maybe.
Cheers!