Yep, problem stayed. I decided to completely strip the tracks of all tags (using Mp3Tag), and re-write them all. After importing them, the same thing happened. However, I then renamed the files and re-imported. This time it worked! I have no idea why the file name would make a difference. It's like MB "remembered" the old tags no matter how many times I removed them, until I re-imported them from a different location. Anyway, it's working now, but I think I'll backup the MB database just to be safe after this odd behavior. Thanks for your input.