As of a few days ago, when I click on a youtube video, as the commercial begins to play, you can begin to hear multiple/different commercials playing at the same time. After the commercials, the same issue occurs with the main video--multiple videos are being played at the same time and are not in sync. I've updated all my plug ins and have tried the suggestion posted in the forum provided in the link below in which someone else has expressed the same issue, but nothing has worked so far. Does anyone know what can be done? http://productforums.google.com/forum/#!topic/youtube/5Lnikma4UqM