UI trouble

I finally have a UI I'm super happy with possibly for the first time since Wrath came out (yes I have been lazy). But now one of the add-ons is not letting me use set focus (which is pretty vital for one of my raid macros). It's strange that so many add-ons cause problems for set focus, and I really wish the makers would test for this damn bug. Last time I tried Spartan UI, it had problems with this issue, which is a glaring flaw for a raid orientated UI add-on. The main issue I have now is I will have to switch all the 20-30 add-ons off one by one to figure out which one is causing the trouble. Great way to spend a Sunday afternoon.