I forgot, I was talking about silver pressed DVD and CD discs in my first post.
Not recordable media, althought I had no problems with pressed DVD and -R discs in the past. Just now I doubt if it's worn out, coz it ain't used that much really and it still plays Audio CD's.
Btw, anyone know how to update firmware or so? Can't find any, but I know that mine isn't the same like one i know in Germany.