I've had a lot of DVD-R and DVD+R discs, sometimes 50% of a couple in one session, burn OK but fail verification. Anyone had this happen with a new Macbook? My 1st new macbook had other problems and Apple eventually replaced it with this one. First had a matsushita, new on has a HL-DT-ST DVDRW GSAS10-N. That, and #3 below, make me think a hardware defect is unlikely. Its a 2.4 GHz duo, osx 10.5.2. Been using the open source "OSX Burn" program, which is basically a front end for the OS burn routines. Data DVD, UDF format. Things I've tried: 1. Different type of DVDs. Verbatim DVD-R and DVD+R 16x certified discs. Occasional Staples brand DVD+R. Doesn't help. 2. Burning at 4x instead of 8x (only 2 choices I get). Does seem to help, but I'm posting today since I just had my 1st failure with 4x. 3. Restarting the computer before an 8x burn. So far, this has always worked, for several 8x burns in a row. What could be happening as the computer runs other programs that would cause all the burn failures? There's 4GB of RAM, and the drive has under-run protection, so even _if_ the data stream was being slowed down I'd think things would go OK.