If you download the patch: ubbthreads-7-5-5p1 you will see the changed files.
Well, I'm assuming that's correct as it is the latest patch available.
Edit: I just noticed that the file dates in the 7-5-5p1 folder are dated 23 sept - so I guess it's the correct file to use.
Shouldn't the patch be renamed to 7-5-6p1 ?
there is a ubbthreads-7-5-6p1 there in the list in the members area download -- the order on the right is kinda not ordered with most recent version on top..