JVC XVN50BK Slim DVD Player
It WAS the player....
Yes, it was a problem with the N50.  It would happen with all different output modes, and would come up almost on cue when I fast-forwarded through a section.  I recently returned the JVC and bougt a Pioneer DV-563AS, and have had no such issues with the same movies in any player mode, progressive or not.  This is a problem that JVC shoull adress, as it is a shame that an affordable player such as the XVN series with so many good features suffers fro this.<br />Here is a review site (CNET) that talks about the problem on the silver (XVN-55SL) player.  <br />[...]<br />Skip this one and go for either the Panasonic S55S or the above-mentioned Pioneer (unfortunately, both only available in silver).