I recently purchased a DVD writer and was happy to find that my Pioneer 545 plays EVERY type of media.. (DVD-R, DVD-RW, cheap, expensive etc). I was therefore happy to recommend the new Pioneer 454 to a few friends. They took delivery this week and I tried a DVD-R and DVD-RW as a test. Admittedly, the media was cheap and nasty, but they both play fine on my 545. I was surprised to find that they didn't work, but I put this down to the fact that it was crap media. This weekend I repeated the test with some good media.. The disks in question play fine on every other DVD player (except the Toshiba, but thats a known problem), but not the new Pioneer! The Toshiba fault is a software issue.. it reads the disk (within a few seconds) and reports 'Disk Error'. But the Pioneer looks like its can't read the media. The disk spins for quite a while and the drive make a bit of noise before it reports that it cann't play the disc. This is quite worrying, as the older Pioneer models have very good compatability.. The fact that they can make a new model which has little compatabilty with DVD-R media means its possible that DVD-Rs written now, may not be readable on new DVD hardware in the future. Has anyone had any experience in this or ideas as to how to fix it. BTW. I am using Nero 22.214.171.124. I know that Nero has its problem, but the fact that the disks play find on other Pioneer models makes me think that this is a problem with the DVD Player.