NB: Also refer to this forum post:
http://forums.slimdevices.com/showthread.php?t=90175

I've upgraded to SBS 7.6.1 and now the rescan option to look for new/changed music does not work.

The functionality appears to do nothing regardless of whether it is triggered from:

1) Scheduled Daily Scan
2) iTunes reload parameter picking up changes to the itunes xml file
3) Manual trigger from the Basic Server page

The forum post above suggests this is applicable to Windows as well as OSX installations.

I previously used 7.5.1 which had no issues with this functionality.

Log extract from when a scan has been triggered from any of the above options:

[11-09-12 22:22:50.4610] Slim::Utils::Scanner::Local::rescan (166) Discovering files in 
[11-09-12 22:22:50.7875] Slim::Utils::Scanner::Local::__ANON__ (246) Removing deleted files (0)
[11-09-12 22:22:50.7877] Slim::Utils::Scanner::Local::__ANON__ (321) Scanning new files (0)
[11-09-12 22:22:50.7879] Slim::Utils::Scanner::Local::__ANON__ (396) Rescanning changed files (0)

This was after changing tags on one mp3 file and also deleting 12 others.

Only using the option to clear and rescan picks up any changes which is needlessly excessive when just wanting to pick up some minor changes or additions to the library.

Please resolve this as I do not want to have to schedule a complete cleardown and rescan every night.