Ok i’ve found an interesting work around that is leaving my puzzeld to say the least.
If I creat a new composition with the HDV/HDTV 720 preset effectively creating a true 1280:720 workspace. Then I drop my DVCpro HD 720p (960:720) anamorphic clip into that comp and everything is fine, no pixelation. However surley I should be able to use the DVCpro HD 720p preset and render out without pixelation.
What gives ?