Hi, I have a problem with my Mac Mini. Every time I insert a DVD, I hear a noise as if it's trying to read it. This continues for about 30 seconds before the disk ejects. At no time does it mount on the desktop. The behaviour is identical under Mac OS X 10.5.2 and Windows XP Service Pack 3. CDs work fine. The last time I tried a DVD was several months ago. I only noticed the problem today. I tried Zapping the PRAM and unplugging the Mac mini and then plugging it back in, but nothing seems to work. The mini is a 2.0 GHz model with a Superdrive. Any ideas? Thanks in advance!