Guys, I'm confused. I ordered r2 spiderman from CD-WOW and they sent the r4 version, my DAVS500 is not chipped & won't play r1 but it seems to play r4 OK (checked briefly before I left for work), is this normal ? Will I be able to play all r4 releases ? Also, is there any difference between r2 & r4 in terms of quality/content ? Many thanks to anyone who can shed some light.