@elg, yes the anticlip fix
@wovweapondrop, I don't think it modifies the game play, it just fixes the center position of the player so that people can't abuse the corner glitch where you can see enemy's, but they can't see you. It might actually fix more, but I can't remember. Maybe Sor or Elg remember.
I haven't gotten around to the pk3 yet because I got busy with house work & fixing my lawn mower last weekend, but I should have some time soon.