Same deal here,
My htpc consists of Vista Sp1, haali, cyberlink decoder, mymovies all running on ATI 3870 with newest catalyst drivers. On VMC started in fullscreen i get no HA and aspect ratio is messed up. However when starting vmc in window mode and starting playback aspect ratio and HA is fine, upon fullscreen works perfectly.
I have applied the evr patch, with no results.
Interestingly enough fullscreen playback on wmp is perfect, the problem only appears on VMC.
The issue seems to appear for me when starting VMC in fullscreen mode.
Anyone else have any ideas.?
Is it possible the custom evr renderer in VMC is defaulting/ or is it more likely the cyberlink decoder.??