Did you read the FAQ's? (top right side of page).
Is the avatar too large-either in size or density? (100 x 100 max size and 6k max).
Double check the url addy, maybe a typo in it?
The Audacity of Bull Crap.
"Typical: Gun-loving, bitter bible-thumping white person" Barack Obama.
Hey I resemble that comment!!! Those are FIGHTING WORDS!!!