Since DP2 and also on DP3 the whole System crashes when playing HTML5 Videos. The screen is flickering and is unresponsive. First I thought it's caused by the Flash Player. So I have completely formated my SSD and reinstalled Mountain Lion. But the issue still exists. The whole system crahes when playing a HTML Video. But it's only in videos in Safari. Playing videos with Quicktime or VLC works fine. Does anybody noticed the same behavior?