FYI: My burner worked just fine with any 4x DVD-R media until I updated the firmware to version 1.0g. After that on some media it would start out at 4x then drop back to 2x and on some 4x media it would only burn at 2x. I then went back to firmware version 1.0f and it still didn't work so I tried 1.0E with the same results. Tonight I went all the way back to version 1.0d and it now burns 4x DVD=R flawlessly. Anyone here also have this problem?