Youtube in HD is impossible for me to watch. The audio lags every once in a while and the video will lag for 20 seconds or so, and sometimes more. Most of the time I have the Youtube wheel spinning in the video. I have the same symptoms in both Safari and Firefox. I just upgraded my RAM to 1.5 GB, so that is not the problem. I checked and I do have the latest version of flash. I even tried my neighbor's internet at 4 Mb/sec. Nothing makes a difference. Help please!