I'm a bit of a newbie to burning DVDs, I have done it several times on my PC, but I don't have a Tivo/DVD player yet - just two standalone Tivos. I'm thinking of getting a Humax Tivo DVD recorder (soon as my Tivo Rewards points get up there). My question is about using DVD-RWs vs. DVD-Rs. I have noticed that if I format a DVD on the PC, to use to transfer files to (for backup of digital photos, etc.), then I can write to it over and over again. But if I take the same type of DVD-RW and burn a movie onto it (using Sonic MyDVD for example), then that DVD can never be written to again - I can't later re-format it or re-burn another movie on it. Am I just crazy or is this just how things work? Is this a DVD format issue or an issue with my PC, or how I am actually burning the movies to the DVD? My guess is that something in the format which is needed to make it playable in a standard DVD player makes the DVD not-rewritable.