I currently use iMovie (v.4.0.1) and iDVD to burn ~2 hr long DVDs of TV programs that I import using a Formac Studio DV. I'm having intermittent problems where the final burned DVD product has NO AUDIO on the latter portions of it. In other words, you'll be watching the program and all of a sudden, it loses audio and never gets it back. Anybody have any idea what might be going on here?