I am using Adobe Flash Player version 11.3.300.257 in Internet Explorer 8 on Windows XP.
Quite a number of times during the playback of a video in Youtube the audio cycles (repeats) causing a stuttering sound and some pops. This problem is worse if the mouse is moved during the playback. I have cleared the Flash Player cache, turned off hardware acceleration and set the cache to 10Mb in AFP. I have installed all the latest updates in Windows, deleted history in IE8 and cleared temporary files in Windows but the problem persists. There is no problem playing videos in Windows Media Player or Quicktime.