Hi I have just got the pioneer 504 HDE, which I think is absolutely amazing BTW, but I have a little niggle with it. Whenever I play an RGB NTSC (525i) source into it I get a black flash, like when you press the same channel on the remote - the screen goes black for about 2-3 secs then the display in the right hand corner of the screen appears when the picture returns. I have tired a different DVD player, switching the inputs, and now it has done after three hours with a new media box. Anyone else had this problem or know what might be causing it? Cheers MT Kit : Pioneer 717, Pioneer 908 RDS, Pioneer 504 HDE, Pioneer CLD -2950, KEF Q7, KEF C95.2, KEF 65 DS, KEF 30B, and a pony pace ntl box.