Same deal here. Has something to do with what is being replaced in attachment.php. For instance line 124 of the latest attachment.php says:
Code:
WHERE attachmentid = $attachmentinfo[attachmentid]
While the hack instructions tell you to replace it with this:
Code:
WHERE attachmentid = $attachmentid
Cuases the whole system to break, and it cannot be fixed just by swapping it out with that new query condition (above). I already tried.