I have a Sony SR-11, a 1080i, HDD-based, AVCHD little bastard. Since HD editing is such a pain, I decided to try recording in the camera's SD mode. This creates files with a .mpg extension that are - inanely enough - some sort of AVCHD derivative. The problem was that despite my best efforts; despite owning FCP, QTP, VLC, and every other bloody plug-in I could find - the audio from these SD files would only play in Compressor (on my 17'' MBP.) I had to Compressor them into oblivion before editing in FCP if I wanted any sound. Really frustrating! Mind-bogglingly enough, the SD files played fine on my friend's MBP (even in QuickLook!) After frantically comparing the two systems' specs, I determined that the only important difference were our respective iMovie versions. She had the new (stupid) one, while I tenaciously had the old timeline version. So, I installed iLife 09 and now the SD files totally work. What the hell?