There has been a couple threads regarding QT 7.1.5 and Vegas in the last few days. While I have not had the problems others have reported, I just finished rendering a couple of QT videos with 7.0e, and it seems like the render times are greatly reduced from what they were in 7.0d. I am doing a localization of a PC product, and the rendering of the videos, with new mixed content have been somewhat painful on my notebook. This afternoons renders have been down right zippy with the same settings.
Just curious,
Joe