So, I bought a Pioneer DVR-111D this holiday season, along with a new WD PATA hard drive and some RAM. The new HD works great- I've had it up and running about 2 weeks and have been watching video off of it mostly. No problems to report. The snag came when Newegg dropped off my new burner. I installed it right where the original DVD drive was, booted up, and System Profiler (I'm running 10.4.8 with no classic or OS9- all my stuff is OSX native) said Pioneer DVR-111D, installed properly, so happy burning! So, I put a DVD of MP3s . . . I had backed up my whole collection off of my external HD with my sister's Superdrive iMac and was hoping to consolidate everything with the big new hard drive . . . Lo and behold the wee &%$#^* won't read DVD-R for turds. iTunes would copy 5 or 6 songs to the library and give me a I/O error. Tried a commercial software CD, and Disk Utility says the volume has serious errors . . . uh oh. SO, any time I try to copy anything from CD/DVD to the hard drive, it'll run for a while and then error out with a 36 code. I/O problems. I've checked the cables to make sure they're not gunked up with dirt etc. and made sure all my jumpers, etc. are good. I've reset PRAM and NVRAM thru Open Firmware, and while it seemed to help, the drive was still erroring out copying from a clean, scratch-free DVD-R. I don't think it's the optical drive as shipped, either, because iTunes also errored out over a HD write when things between the two drives got hot. The problem isn't very replicable, either, instead being very intermittent. My suspicions are directed at the ATA controllers. Some ideas: 1) The drive may not like the ATAPI controller, the Pioneer being able to exceed a 33.3 MB/s bandwidth on a 16x read/write. 2) The cable may be 40 wire instead of 80 wire and that could be something. Is the stock ATA cable to the CD drive in a Sawtooth 40 or 80 wire, anyway? 3)The controller isn't bunk because the old 5x DVD reader played movies fine. It at least works on that level. 4)I've got an internal Zip 100 drive. That shouldn't even matter. Any ideas? Should I sent it back for a replacement, or is there something I'm missing? I've heard of people dropping 16x DVD burners in Sawtooths with no problems.