Vegas Pro 13, 14, 15...still working fine for exporting Quicktime 7 codecs & DXV. Would still love to have a dedicated DXV export plugin for Vegas Pro though!

I have also experienced the A/V sync issue. I've found that upon first start & run the A/V sync will be fine - playing a longer vid with its own audio. Then after a while of playing other loops, audio assets, etc. & going back to replay the first vid, the audio then runs out of sync - which ...