Hi, Thing is: I'd rather not install it. But without it - No Youtube. I've been placed in the Html5 trial but I have to say IMHO 80% of the videos I would want to watch are still Flash based. So, is there any "real" reason I shouldn't install Flash? My system is brand new and I'm very picky about the software I put on it. Anybody experience any instabilities etc on Mountain Lion afterwards?