I just realized a good fix for this hack, to make it more accurate. I noticed with the first version I had it check for similar threads only in the forum which the thread originated in. If you do this with this hack, you get much more valid results, mostly if you have a large forum.
I've updated the instructions to include this, so just re-upgrade the
codechunk.txt.
If you want to just do it manually, find (in the codechunk):
PHP Code:
AND thread.visible=1
And replace it with:
PHP Code:
AND thread.visible=1 AND thread.forumid=$thread[forumid]