[list][*]click on user cp[*]click on Edit Options[*]click on Change Avatar[*]go to the section You can upload an avatar from your computer[*]click on the browse button[*]select you file on your hard drive[*]click on open[*]click Submit Modifications[/list:u]
The maximum size of the avatar is 75 by 75 pixels and the file size should be kept under 10 KB. If you have any more questions, just let us know.