Tried that. Nothing changed.
I think I will try and delete one file from MC and then reimport and see if that does anything.
Also interesting, I have one Music-Video (Eric Clapton Unplugged) where the dimension is listed as 352 x 480, but MediaInfo syas it is 704 x 480 (and all my 704x480 tags should be 720x480 according to MediaInfo).
Thanks.