Cubase 6 - behavior of Audio-Part-Editor bug or feature?

was really looking forward to Cubase 6 for it’s new multitrack editing feature … looking forward to a much quicker way of editing … BUT NO!! I always edit down takes in the Audio Part Editor, (when editing large numbers of takes, it really helps to keep you session tidy), but now my mute tool is all screwed up. This is driving me insane! I have used Cubase since the Atari years but now I might have to change. Steinberg: PLEASE give people the option to edit in the Audio Part Editor with a functional mute tool!!