David,
I just came across your post:
However, you should not be using QT Conversion anyway, you use Export — Quicktime Movie using Curent Settings. QT conversion recompresses every frame and is inferior to almost all other export modules. It should be used as your export of last resort when nothing else will do the job or when quality doesn’t matter.
This concerenes me, because I just did a lot of conversions already.
My problem is, that I use Photoshop for video, and I can not find any other option to export the video.