If you're speaking about gif animation when you're web-browsing internet using firefox.. Yeah, it's an annoying bug, but from firefox... Not SL.
Just to be sure, try with a different browser...
If you're not speaking about "gif animation when you're web-browsing internet using firefox" then I don't have any idea of what you're talking about.
"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former."
"Sólo dos cosas son infinitas, el universo y la estupidez humana, y no estoy seguro acerca de la primera."
- Albert Einstein