Thanks to Ric for pointing to the new Apple KB article on unexpected Safari quits. This has suddenly started happening for me within the past week on both my TiBook and my Cube. Reading through the KB article, I believe my problems with each are solved in section II of the article, regarding QuickTime preferences. Yay! Last night, Safari died on my Cube after I watched the Matrix Revolutions international trailer (rocks!), and I noticed Safari died on my TiBook a couple of days ago after listening to a QuickTime-encoded MP3 on a web site.