I have some new information about this problem. I have two files named thusly:
./Music/iTunes/iTunes Music/Music/Wendy Carlos/Clockwork Orange - Complete Original Score
./Music/iTunes/iTunes Music/Wendy Carlos/Clockwork Orange - Complete Original Score
The surprise out-of-the-blue folders are
So my Time Machine System Restore created top folders from the last four tokens of the files above. Any ideas? A bizarre file corruption in one of the Time Machine backups?
Oh, there is the Retrieved Contents folder, but that was created Apr 27, 2011. My backups from that period are presently offsite, so I cannot investigate this one further, at the moment.