I have installed Windows XP, Windows Vista Home Basic and Windows 7 Beta build 7000 on my 2.0GHz 13inch Unibody Macbook and on all three operating systems web browsers crash when watching flash video (Youtube). Browsers I have tried: IE 7 IE 8 Firefox 3.0.8 Opera 9.6 Chrome 2 Safari 3.2 I get white and black lines appear randomly on the video and pops in the audio. Then, the web browser will crash. Is the same for ALL versions of Windows mentioned, and I have tried reinstalling Flash player, every time. Any help fixing this problem?