Every browser I have (Google Chrome, Mozilla Firefox, and Internet Explorer) all crash when trying to play any Netflix or YouTube video. Additionally, I have had a dialog box appear telling me Shockwave had become unresponsive and asking me if I'd like to end that process. Netflix, judging by the "Silverlight has stopped working" message I received on the few times the entire browser doesn't crash, uses Silverlight, whatever that is. YouTube uses Flash. The only clue I have is I just updated my video card software to "AMD Catalyst 12.1."
I have an AMD Radeon HD 6800 Series, and I'm running Windows 7 Home Premium 64-bit.