Further to my recent post regarding the 105 and various media I have now completed extensive tests of four types of media. Test 1 involved creating an iso image of a dvd with dvdDecrypter. This image was then burnt using both InstantDisc and dvdDecrypter to the following media: Ritek G04 4x Verbatim dvd-rw 1x Datasafe 2x Datawrite "yellow" 1x In each case the Ritek and Verbatim discs were burnt perfectly and both the Datasafe and Datawrite discs failed. I even tried to burn the Datasafe at 1x but this also failed. Test 2 involved ripping a dvd using the file mode of dvdDecrypter and burning using both Nero 18.104.22.168b and InstantDisc. I had exactly the same results as the previous test. Therefore I can only conclude that either the cheaper media is faulty and should be returned to the supplier or the 105 does not like the cheaper media and should maybe be returned to the supplier!! In any case the Ritek 4x media is not that expensive in the UK, I've just bought some for £1.89 ea which is a damn sight cheaper than a whole load of failed discs. What really irks me is that I have spent around £50 on the cheaper media (which was sold by the retailer as being compatible with the 105). If it was made clear that it does not work with the Pioneer then I would have been happier buying the dearer discs.