[BluPhoenix]

Maybe too late now but here goes..

in includes/cron/cleanup2.php find:

$attachments = $DB_site->query("
		SELECT attachmentid, userid
		FROM " . TABLE_PREFIX . "attachment
		WHERE postid = 0 AND private = 0 AND
		dateline < " . (TIMENOW - 3600)
	);

and change it to:

$attachments = $DB_site->query("
		SELECT attachmentid, userid
		FROM " . TABLE_PREFIX . "attachment AS pmattach
		WHERE pmattach.postid = 0 AND pmattach.private = 0 AND
		pmattach.dateline < " . (TIMENOW - 3600)
	);