Actually I’ve been having the same problem rendering to mpeg 2 as well. The Mainconcept encoder does both (m2t and mpeg 2)and it got horked up somehow. So far I know 3 people, myself included that are having this problem – it’s interesting but man, I got no solution….
I actually had a very nice conversation with Sony tech support – great guys and very helpful but they sure could not reproduce the issue. It seems like a little ghost in the machine – Hopefully Vegas 6 will fix this bugger – only 12 more days. Man I can’t wait!
Good luck,
Yoyodyne