And you've checked that the audio is in sync when played back in the camera. That means it has to be a capture problem of some sort. That iMac is fine for editing HDV; I have a friend with a year old iMac 24" and he shoots nothing but 24F. Are you capturing 1080p24, and then editing in a 23.98 timeline?

i just had the same issue a few days ago. i was freaked out b/c i didnt know if i had just recorded the whole thing wrong when i shot it. when i captured in imovie my audio was off but once i got into fcp 6.02 it was perfect.

if your using fcp make sure your settings are for 24p!!!!!

Thanks Bill and Josh, I was waiting around for days for Canon to call me back but no luck. I then set the settings to 24p as you guys suggest, and that solved the problem. For some reason I was confused thinking that whatever settings of the clip one imports, FCP automatically will adjust the settings to accommodate the timeline, and I was still spooked by my experience in Imovie.

Thanks for helping, I'm happy to know I can utilize 24f again with no problems.

Michael

Glad it's solved.