Need to go back to 7068 from 7077. Lose anything?

After a long struggle with my DIgital Cable PID, which I've since solved, I was very excited to upgrade my main HTPC to the latest Win 7 Beta. I was planning to do this with 7068. However, in the mean time 7077 came out. Problem is, 7077 breaks Arcsoft's Total Media Theater - which makes it a deal breaker. Cyberlink is not an option, as we have a fair amount of HD-DVD's. I have no problem rebuilding a 7068 installation (which amounts to re-cloning my working Vista installation, and then upgrading it from there so I can keep my HD content), but I'm wondering if I'll miss anything.

I know that all the hardware I have on this system has been supported since 7000, so I'm really concerned about performance bugs - especially Media Center bugs.

Thanks!

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