I also bought the 48-16-48 version A, and I had a problem with the CD-RW that was given with the driver.
It just seems to be a really bad quality CD-RW, as after I burnt it, I noticed that the coating was peeling off.
?( At that point I couldn't use the disk anymore.
But CD-R are burning well. :P
Just one other thing, the 48-16-48 cannot burn 100 minutes (875mb) CDs. Hopefully MSI's going to do something about it with the next firmware.