[thincom2000]

$lastfetchtype is a new string this adds to track what the last generated postbit was (i.e. a post, PM, etc.)

PHP Code:

$lastcheck = ($lastfetchtype == $fetchtype) ? true : false;
$lastfetchtype = ($lastfetchtype != $fetchtype) ? $fetchtype : $lastfetchtype; 


means:

If $lastfetchtype equals this $fetchtype, $lastcheck equals true, otherwise $lastcheck equals false.
Now that we know what $lastfetchtype is, we can bother changing it. If $lastfetchtype is not the same as this $fetchtype, update it, otherwise leave it alone.

There should be no need to reference $lastfetchtype.

Are you using Linear or Hybrid / Threaded Modes on your forum?

EDIT: Here's some screenshots to show this actually did something for me. I'm really clueless as to why it wouldn't work for others. I'll restore my backup showthread and check it out.

EDIT: I restored my backup and tried it again. No problems. Note that the line

PHP Code:

$postbit_obj =& $postbit_factory->fetch_postbit($fetchtype); 


appears twice in showthread (line 1046 and line 1507), and for the most part we are only modifying the first appearance. If you are experiencing problems, try changing it at both places