I'm running PD6 (latest version) on a 2010 Macbook Air (Lion) with Win7 installed (not boot camp) in coherence mode. I have had no issues since I purchased the Air and PD6 just over a month ago. All updates for Mac, Win, and PD6 have installed with no issues. Running Win 7 side by side with Mac OS has satisfied me completely but I'm not over stressing either with games or anything. All systems running smoothly.
Hope that helps.