HI all. I have a Macbook with the DVD-R writer/burner, and until about a week ago it was working fine. Usually, I just insert the blank DVD, open up the iDVD program, and it goes through the process successfully to burn the movie. Now, after it does the "Encode" video process, the iDVD program closes and the window for inserting a blank disc follows (You inserted a blank disc, open with: blah blah). I thought maybe it was an iDVD thing but it did the same thing with Toast Titanium and closed after it converted the file to MPEG so it could be put on a DVD. Any ideas????