So I was rendering a DVD and about halfway done too - man is this thing fast - well I was still doing other things so I opened a widget. Big Mistake. The ripples somehow crashed iDVD. Furthermore, iDVD from then on refused to open. I thought my project was corrupted so I went to show package contents to delete the rendered files - finder crashed. I clicked on a menu extra, SystemUI crashed. I then went to restart and the restart dialogue boxed lacked a graphic. That whole experience was freaky... I blame sharing video RAM and System RAM.