Hi,

I had warning:

Array Key Exists : The Second Argument Should Be An Array An Object

on this line

if (array_key_exists('cid', get_object_vars($account))) {
if (variable_get('user_picture_imagecache_comments', 0)) {
$size = variable_get('user_picture_imagecache_comments', 0);
}
}

I fixed it this way:

if(is_array($account) || is_object($account)){
if (array_key_exists('cid', get_object_vars($account))) {
if (variable_get('user_picture_imagecache_comments', 0)) {
$size = variable_get('user_picture_imagecache_comments', 0);
}
}
}