OK guys, I've got an interesting one for you! After battling with LMCE to get it installed and running, I finally get through to the lovely alpha-blended UI showing the nice fading pics. So I go ahead and stick in a DVD (I've already installed DVD CSS and the codec pack as suggested during the setup process) which plays wonderfully and automatically. Great, thinks I, as I go to check a different chapter, only to find that no matter which button I press on my mouse - nothing happens! The closest thing I get to recognition that I'm doing anything is if I right click I can see the 4-way arrowed crosshair thing for a fraction of a second before it disappears again.
I'm using an old Logitech wireless mouse, but have also tried it with a wired MX518, which did exactly the same thing. The only way (that I've found) to stop the DVD is to CTRL-ALT-BACKSPACE and reboot the machine. I thought that it might be the DVD, so have tried 3 that have all done the same thing. I've also ripped one to the hard drive and tried playing that back, but have encountered the same.