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    Not exactly a bug, but into www/ edituser.php, it would be nicer if you replace
 $avatar_selected = in_array($avatar_selected, array_keys($avatar_list)) ? $avatar_selected : "blank.gif";  
By :
 $avatar_selected = in_array($avatar_selected, array_keys($avatar_list)) ? $avatar_selected : "../uploads/avatars/blank.gif";