BUG in dvd reading from 6.3.1.6 and above versions

Hi, there is a serious bug in Nero 6.3.1.6 and above versions. When I try to make a dvd copy, it ejects the disk with the “the disk is invalid or blank” error.

Note that the dvds are not copy protected. I have no problem at all with Nero 6.3.0.3 and below versions. As soon as I install everything from 6.3.1.6 to 6.3.1.15 , Nero cannot read any dvd in order to copy it.

I have a pioneer 120 dvdrom. Please someone report the bug to the authors, it seems they’re totally unaware of this.