I'm not sure why but ever since I loaded snowleopard I can't get any quicktime vids to play. If I do get it to open I get sound only, or usually I get the message, "QuickTime Player must be installed to run this application." However, I do have QuickTime Player installed - vers 10.0. I've had my macbook for 3 years and by far this is the biggest wtf is going on since I bought it. I love my mac, but what in the heck is going on? Help!