just one file, tags not being seen

mp3 file, tag version ID3 v2.3. Looking at tags with eyeD3:

16 - I Thought I'd Write To Juliet.mp3 [ 5.68 MB ]
-------------------------------------------------------------------------------
Time: 04:08 MPEG1, Layer III [ 192 kb/s @ 44100 Hz - Joint stereo ]
-------------------------------------------------------------------------------
ID3 v2.3:
title: artist: Costello, Elvis / Brodsky Quartet
album: The Juliet Letters year: None
track: genre: Pop (id 13)
root@trekulbollux:/storage/usb2/music/non_m4a/dl/Elvis Costello/Elvis Costello - The Juliet Letters# eyeD3 01\ -\ Deliver\ Us.mp3

01 - Deliver Us.mp3 [ 597.18 KB ]
-------------------------------------------------------------------------------
Time: 00:50 MPEG1, Layer III [ 96 kb/s @ 32000 Hz - Stereo ]
-------------------------------------------------------------------------------
ID3 v2.3:
title: Deliver Us artist: Costello, Elvis / Brodsky Quartet
album: The Juliet Letters year: None
track: 1 genre: Pop (id 13)



(second file shown for comparison).


Second file shows up with album/artist as per tags.

First file always shows with artist "Costello, Elvis" and hence does not get grouped correctly.

And it gets odder - I renamed the containing directory and did a rescan (new and changed).

Now the first file takes its album name from the new directory name!

What is going on?

tail of scanner log:

[14-11-08 20:41:11.8330] Slim::Utils::Scanner::Local::__ANON__ (410) Rescanning changed audio files (0)
[14-11-08 20:41:12.3892] Slim::Music::Artwork::precacheAllArtwork (447) Starting precacheArtwork for 853 albums
[14-11-08 20:41:35.6975] Audio::Scan::scan (64) Warning: Error: Unable to read at least 16 bytes from file (only read 9).
[14-11-08 20:41:49.5755] Slim::Music::Artwork::__ANON__ (552) precacheArtwork finished in 37.178936958313
[14-11-08 20:41:49.5760] Slim::Music::Import::endImporter (617) Completed precacheArtwork Scan in 37 seconds.
[14-11-08 20:41:49.6763] Slim::Music::Import::runScanPostProcessing (400) Starting Database optimization.
[14-11-08 20:41:50.2321] Slim::Music::Import::endImporter (617) Completed dbOptimize Scan in 0 seconds.

thanks!