Ok, I did a few more tests and it seems to confirm my suspicions regarding Nero 6.0. Out of the three discs I tested, all three failed the data verification in Nero and were also (partially or completely) unreadable. Writing the same content using CopyToDVD was more successful. The Verbatim DatalifePlus DVD+RW 2.4x (MCCA01) and the TDK DVD-RW 2x (TDK502sakuM3) were readable and their content could be copied from the DVD onto my HDD. I tested a few files (ZIP archives and executables) and they seem ok. The third disc, an Imation DVD-RW 1x (OPTODISCK001) failed miserably, so I take it that the medium is just crap. As happy as I am with Imation + and -r media for movies (CMC), I will keep my fingers off the RW versions.
What bugs me is, why discs fail when they are written with Nero and yet, writing Video DVDs, Nero beats everything I used before when it comes to KProbe results. ANybody got an idea? I'll have to see that I upgrade 6.0 to 6.3 in the hope things have changed.
Just added some KProbe scans of the discs after they were written with CopyToDVD. Please note, that the scan of the Verbatim isn't complete. KProbe came up with a "servo error" at 99.8% or something, so I interrupted the run. It's close enough to the end anyway. The results for the Imation disk are pretty shocking I'd say