i have a pioneer 103 burner and up until a couple days ago it seems like 2 out of every 3 movies that i burn come out messed up. the movies either skip or pause a lot. i have installed window blinds i dont't know if that interferes with the burner. i have the firmware for 2x dvd media.......i recently used some 1-4x media and i don't know if i am supposed to download firmware for 4x media....