Blu Ray Help.

When ever I play Blu Rays on my ps3 (which is fantastic by the way), sometimes during the movie there is this strange pixilated image. Kinda like it's 'mosaic-ing' the picture but it only happens for about a second then the picture goes back to normal. I don't know how to explain it. The sound is fine however. I was wondering if this is normal (I hope not), or if it's something wrong with the disk/cable/ps3. The movies I've experianced it are Sunshine and 2001 Space oddessy (the only other BR I have is Blade Runner which played fine).

Thanks in advance.

I can't say i had a problem with any blu-ray movies that I have. I have even rented them from netfix without any problems. It might just be the disks that you have, because you did say your other disk played fine. The only problem I have noticed with the drive is that it is sesitive when it tries to read DVD movies. I had to wipe a couple of them down before my ps3 could recognize it.