The block has been updated, at first it did not include this option as FB had plans to only leave gallery avatars, if using nuke 6.0 the code as posted
above would change to
Code:
if (eregi("http://", $user_avatar)) {
$content .= "<a href=\"modules.php?name=Forums&file=profile&mode=viewprofile&u=$uid\"><img alt src=\"$user_avatar\" border =\"0\" width=\"32\"></a></td>";
}
else
$content .= "<a href=\"modules.php?name=Forums&file=profile&mode=viewprofile&u=$uid\"><img alt src=\"modules/Forums/images/avatars/$user_avatar\" border =\"0\" width=\"32\"></a></td>";