I haven't been recommending AVG for awhile do to the high number of computers I've seen with AVG that still get infected from some pretty routine malware. But this the second big snafu in have made me think I'm going to tell people not to use AVG any longer. At least MSE will be out soon so I can start installing that on customers PC.
http://www.neowin.net/news/main/09/07/26/avg-update-breaks-itunes
http://www.neowin.net/news/main/09/07/26/avg-update-breaks-itunes