Audio out of sync issues

[Goinsey]

I have been using Action for about 5 months now and I have never had a problem
but recently whenever I make a recording over 10 minutes the audio just drifts horribly out of sync, I have tried fixing this in vegas but I'm not about to sit through 2 hours of footage lining up the audio frame by frame.
I have also tried playing around with the settings but to no avail.

Is there any info on this people can give me or am I missing something simple?
Any plans for a fix from mirrilis? ( as I can see from going through the forums that I'm not the only one )
Is it related to recording 2 audio lines? (game audio with teamspeak and my seperate MIC)

Questions questions questions

[radi]

Does this issue occurs with AVI or MP4 format?