Animated GIF craziness!

[Squeek]

Wow, my first post here...  

Anyways... since I probably started the animated avatar fad (hehe) I have noticed plenty more animated GIF's being used for an avatar... And, strangely enough, all of them slow down near the end of their cycle!  Once it reaches the end, It goes back to normal speed, then slows down again, over and over again... This happens to every moving avatar BUT mine.

Is this my browser or something...  I can't tell. Hopefully someone can resolve this

~Squeek