Again, you've given me what I need to move to the next step. Now I find that both +R and -R discs work in my Sony once I've finalized them. Yesterday, I just didn't notice the on-screen message that came up about finalization when the disc was ejected.
One other question: I want to record a movie that's 118 minutes long, and I'd like to use the 2-hour mode for best picture quality. Do you know if the finalization process will take so much space that the disc won't finalize with just two minutes shy of 2 hours recorded?