I have my 1633s now for a while and have always used the firmwares from codeguys on my media.
I also use to buy Phillips 2.4 and 4x media and never did have any problems with Phillips media. Really a very good quality.
But with my 1633 burner I wanted faster media and bought 8x Phillips and from that moment I started to have problems. The DVD's are not readible in any standalone DVD player and they do read in my computer but also sometimes with problems. The firmware I used was " BS41".
So I changed firmware to "BS0S" and burned on a Verbatim 8x media (also very good quality media) and no problems here... so I thought it can be the firmware, because I read on other forums of people using Phillips 8x media without problems.
So now I started burning my 8x phillips again on "BS0S" and again... problems
Do other people use this media on a 1633s and do you have problems with it?
A friend of mine used 1 Phillips disc from me to test if there was a problem with the batch I got, but on his 401s@811 there was no problem whatsoever on 8x burning.