here's my problem. i'm using dvd shrink and nero. i'm having problems when i burn at 4 speed. movie freezes at the end usally around the last two chapters. i have the target set at 4300. when i burn at 8 speed everything is fine. i use tdk or verbatim -r have problems with both. can anybody help me with this problem, because i've always heard its best to burn at 4 speed.