[PROBLEM] Scan works but albums / artists not shown

[jwillans]

Hello - I can see from the log that the scan of my samba drive has covered my music collection, but only a small subset of this is appearing in the UI.  For example here is an example from the log:

Feb 15 17:33 : update: added NAS/FrodoMusic/Stan Tracey Trio/Zach's Dream/05 Over The Rainbow.flac
Feb 15 17:33 : update: added NAS/FrodoMusic/Stan Tracey Trio/Zach's Dream/04 In Walked Bud.flac
Feb 15 17:33 : update: added NAS/FrodoMusic/Stan Tracey Trio/Zach's Dream/01 You Stepped Out Of A Dream.flac
Feb 15 17:33 : update: added NAS/FrodoMusic/Stan Tracey Trio/Zach's Dream/06 Bye Bye Blackbird.flac
Feb 15 17:33 : update: added NAS/FrodoMusic/Stan Tracey Trio/Zach's Dream/03 Gone With The Wind.flac
Feb 15 17:33 : update: added NAS/FrodoMusic/Stan Tracey Trio/Zach's Dream/02 Zach's Dream.flac
Feb 15 17:33 : update: added NAS/FrodoMusic/Stan Tracey Trio/Zach's Dream/07 Blue Monk.flac

But this album (among several 100 others that are scanned in the log) does not appear.  I have tried both a manual refresh and a reboot.  Any suggestions?