I have played many (hundreds) of DVDS and CDS etc. on my Denon5900, and they all look and sound excellent, except the first disc of LOR return of the king (extended vers.) I have exchanged the discs 3 times, with the same problem, only on the first disc. When the disc loads it makes a 'shuddering' noise, as if it were hitting something. This same disc plays fine on my old sony DVD player. Has anyone heard of anything like this before?