Almost wtithout fail, if I use the advance capture in Vegas 6c, the captured video is badly pixelated. Using the capture in/out positions for Time code results in such behavior every time. Using the non-advance capture, manually starting at the beginning and stoppping at the end of the clip seems to produce normal captures. At some point before upgading to version C, this feature worked fine. I have re-installed a few times and nothing helps.

Any advice as to cause?