I noticed in your first clip the vignetting was a bit off center with more showing on the left.Since your other clip didnt really have that problem, my question is did you fix that and if so,how?
I've got the same problem on my dvx100a and the vignetting is really lopslided where you can almost see the whole curve on the left. =/ http://www.youtube.com/watch?v=1R8u4uR5W8Q&feature=plcp