Video playback: sound lags

I'm having an interesting problem: I use SnapStream Beyond TV with iTunes integration to record TV shows on my computer, then watch them on my iPod or iPhone later.
Before the 2.0 update, this process worked perfectly. Now, none of my recordings play back properly. The audio track is just a tiny bit slower than the video track, and half an hour in to a show, the delay is several seconds. It's weird watching a conversation where the speakers have actually switched sides because of the delay.
Has anybody else had problems like this? I have to wonder why Apple changed a codec that was working. It's not just my BTV videos that won't work. My video camera records straight to MPEG-4, and those videos play back perfectly on my iPod Classic, but I get only audio on the iPhone.
I'm half considering downgrading back to 1.1.4, but I'm not sure if that's a smart thing to do - I could live without apps support for a while, but I had every intention of getting a 3G phone in the next few days; I'd much rather get Apple (or Snapstream) to fix the video bug.
So the question is: how do I report this to Apple, along with a sample recording, so that they can fix the codec?

I have a similar issue with my Asus K55N, I've had it for three months and it has Windows 8 as well, but I've been having issues with since I got itunes on it. For me, over a space of five minutes I get 1-3 seconds of audio lag to the video, making me have to pause it and play it to let it catch up. I've played with the playback settings for Itunes, for Quicktime, and anything else I can find to deal with video and audio settings. Even when the newest release of itunes was downloaded this weekend I am still having the issue. So I think it might be a problem with Windows 8. (maybe with more replies the Itunes support staff will find the thread with an answer.)

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Video playback: sound lags

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