I have a home DVD recorder that burns in +R format. I burned a couple of movies to DVD and then tried to play them in my iBook. It would not play and apple says the unit will only play -R format. So I burned another movie just to play on my home unit. This time I was out of DVD -R DVD's. So I used a DVD +RW DVD. When I finished burning it I said let me try it again and guess what it plays fine. I called apple and told them, they said well it might play but we can't guarantee that format will play but it might. What are you guys finding with the different formats playing in an iBook.