Rob, sorry I never got back to you since then but I have been on vacation, about to leave again, and haven't been in game or the forums for more than a week now. Anyhow, I did some testing and still received the problem without being able to isolate what caused it. Basically, anytime after starting my wow instances (usually 4, but tested with 3/2/1 also) if I closed one then my CPU usage would shoot to 50% at a minimum until I closed KeyClone. I have not had a chance to test the alpha you linked but after the holiday when I return from the second half of my vacation, I will be sure try that out.