We had the same problem before..
But now.. i have some tips..
1. find and choose an avatar..
2. save it to your computer..
3. Then, go to this site
http://www.imageshack.us/4. Click browse, and choose the avatar that you save.
5. Click Host it!
6. Wait.. Wait..
7. Copy the URL Direct Link to image
8. Go to your Profile -> Modify Profile
9. Choose "i have my own pic", then paste the URL.
10. change profile.
That's it..
Reply a post if my tips help you..
Thank's..