Well I am usually on the Linux side of my computer and I have noticed that several store bought DVD's that I tried to play could not be seen or played! Usually the computer would be able to see the title of the DVD, but no fields would be filled on in the DVD Properties and I would never get to a menu. Now this only happened on some DVD's so I thought that that my player was dyeing.
But tonight I had the idea to try it under Win7 and guess what, it read and played every DVD that had failed to play under Ubuntu!

Anyone else had or heard of this problem?