Does anyone know why I am having avatar problems?  It dropped my old one and now won't take my new one.  Yes, it is resized to 200 x 200 pixels.  I removed my Walking Horse picture under my signature, thinking that was the problem, but it still won't take.

I had that same problem, and had to change my file name on my pic from UPPER CASE to lower case jpg.  Seems like any changes in your profile at all messes up the avatar.