HI, I just got a brand new iMac '09 with. I love it already but the only problem I seem to be having is iDVD. I got a movie that is about 700 MB, and would like to burn it onto DVD. First iDVD was saying its too large for the 4.2 GB DVD, so I selected high quality instead of previously selected Best Performance. That fit the movie onto the DVD. Once the encoding was done, I burned it. However now, when I play in on my DVD player, there is no video (green screen) and sound is all scrambled. Same thing when I play in on the iMac. I then noticed that already on the preview menu (under media) the movie is played with no video and damaged audio. Also, when it was finished burning on the dvd, iDVD kept asking for blank recordable DVDs to be inserted, which after two ruined dvds I cancelled. Never had this problem with Nero on the PC. Is there something I need to do? Really appreciate help. thanks!!