dost thou possess a SCSI Zip drive from Iomega? I was getting this for a while. Believe it or not, it seemed to make a difference whether I had a disk in the Zip drive or not, whether this bug occurred. It only happened at shutdown, and only after installing the new Iomega software. Now, I could be dreaming, but keeping the disk out of the Zip drive when I shutdown, ended the error for me. Good luck.