I installed svn-1488 on my NSLU2 (6.8 and unslung to the disc drive) just now and also had no problems with updating.
I then ran a Full Rescan from the web interface and it seems to have completed successfully.
Since the previous WMA/tag-related scanning issues I reported some months ago (and which Ron fixed) I have only added very “vanilla” 192k MP3 files to the library, and it seems to have full-rescanned correctly under both 1463 and 1488. I didn’t delete the .db file recently, but I _did_ do so about a month ago (so it would have been re-created by a fairly recent nightly build – maybe 4-6 weeks ago).
ted.h.