thanks Liggy for answering!
have done a phone call to plextor support because the Problem with VERBATIM DVD+R, where I got the answer that VERBATM is not listed in their compatibility guide for PX-800A!
Actually just a few manufacturers are listed for support.
I have tested two different types of VERBATIM media, one of them is DVD-R which works well, the other one is DVD+R and does not work - many errors!
Interresting is that Plextor is is not offering a firmware update to increase the compatibility for medias!???
Possibly someome with a Plextor PX-800 can tell about if his drive works well with VERBATIM DVD+R.
The point is that I do not know if the new PX-800 is really not able to burn VERBATM DVD+R’s or the drive is bad and has to be changed.
Would you suggest to try "1.NC firmware " or do a RMA?