Mac OS X 10.3: DVD Player - Unexpectedly Quits When Second Video Card Is Installed
DVD Player may unexpectedly quit if a second PCI video card that doesn't support DVD playback is installed in your computer. This document applies to Mac OS X 10.3 through 10.3.2.
Download and install Mac OS X 10.3.3 Update or later to avoid this issue.
If you're not ready to install, this issue can occur even if the second video card isn't being used for the main display. To fix this, remove the second video card.