Hmmmm well all you can check is the avatar size , 155x155 max ,Theres no mention in the faq about a kb limit but I have had problems in the past so would suggest you try and keep it under 25kbs .
For reference ,
http://www.screwcutter.pwp.blueyonde...mages/e102.JPG is the url for my avatar note the file type is .JPG not .jpg . If you want , give me a link to your avatar and I will upload it and we can see if that works .
[Edited on 7-4-2006 by Screwy]