I have a NEC NR-7900A CD-RW and find that often I can't eject the CD in the drive. I usually have to reboot before it will eject, and then if I put a CD back in the drive and access it once or twice, the same thing will happen.
I also just installed a Sony DRU-500AX DVD-RW and the same thing is happening with it.
I'm running WinXP Pro on a Micron ClientPro.
Any ideas what's going on?