So i just got this refurb 2010 15inch MBP from the online store. For some odd reason the flash playback has been awfully buggy. After messing around with the settings i think i got it to stabilize and play youtube videos effectively. However, all the other flash based videos on other websites are choppy as hell. I have hardware acceleration checked(without it Youtube videos become out of sync w the audio) and if i uncheck it, the videos do play smoothly on sites like Hulu and Espn or NBA but again.... it's really out of sync and it's unbearable imo. Just can't watch videos like that. I must add, this happens when i switch to fullscreen mode. Now, here's the tricky part, I downloaded Chrome. As some of you may already know Chrome comes with its own flash plugin and for some weird reason, all video content looks/plays flawless there. Now i love the look of the Safari web browser and i understand Lion will be shipping shortly with an upgraded version of Safari but i'd like to get this thing fixed now. Does anyone know what might be causing video playback to be so buggy on Safari ?