Sorry I must be blind. Yeah the Pixel Aspect Ratio was already set to the correct one. I'm at a loss too. I really do not want to have to do all my cuts again. I've literally JUST finished doing just that a second time!

It had prompted me to make sequence settings match clip settings, but that was a while ago when I was working with DVCPRO50.

And again, if it's working for the exact same clip dragged into the timeline, why shouldn't it be working for this? They're right next to eachother in the timeline, but they're sized differently! Defies logic and is driving me nuts!