Hi Pelle, no I didn't try CRC checking them, but I do make nero verify the files all the way through, and had no failures so far.
I Phoned Pioneer UK tech support today, and was told that There are clones of TDK and Verbatim discs that use the manufacturer IDs (such as TDKG002.000000 more about that later) but use inferior quality dyes in their discs, and it is these inferior dyes that cause the discs to fail when burning.
The drive apparently knows the spec. of the discs according to Mfr.ID and tries to burn the disc according to that spec. but as the discs are using an inferior dye the Laser is set at the wrong 'strength' to burn that disc, so it fails after lead in.
The guy at Pioneer also told me that they are working on a new firmware release sometime in the next 2 weeks, and he also gave me a list of discs that will work with the drive. and they are also working with the disc manufacturers to improve disc build quality and compatibility.
The following are discs that *DO* work with the drive, * note these are all branded discs.
TDK (watch out for Clones)
Verbatim (watch out for Clones)
although I haven't used the CRC app. on my burns so far, I have retrieved a lot of rar files from the discs, 2.5GB worth, and the files inside the .rar files unpack without CRC errors, so I guess that is almost as good a check?
The man at Pioneer (Very helpful and informative :) also told me that the 'clone' discs have a brownish or blueish tinge to the dye and are using a pure organic dye, whereas the original discs have a nice purple tinge to them, and are using a a different dye type. which is why people think that pioneer are 'banning' the cheaper media. but it's because the media actually doesn't meet the correct specifications and isn't of good enough quality.
Now, I used the advdinfo app. to check the manufacturer ID of both of the 2x discs that failed and they both turned out to be 'TDKG002.000000'. This was on a Datasafe 2 speed and an unbranded white Label disc, so it appears that the man at Pioneer is correct.
Also, there *IS* some information on the Pioneer website about which media the drive can handle, it's a little hard to find but it is there in the FAQ section. Click here
(Edited from webmaster
So, I guess at the moment we will have to wait and see what occurs in the next couple of weeks over firmware.