I'm using a LITE-ON DVDRW LDW-411S to backup my movies. After having to throw away like a dozen DVD-R's because of nasty pixelation and strange freezes on the movies, I changed the write capacity to 4.38GB, and now all is well. I don't get it!! Isn't the 4.38 nominal capacity the norm for a 4.7GB DVD-R ? What might be causing this capacity problem here??