Converted ID3 tags...now QS can read album art but iTunes can't!

[devburke]

So, after seeing a post suggesting upgrading all ID3 tags for embedded
album art to work, I did.  And for the most part, it worked.
Strangely, though, one of my tracks appears in iTunes to no longer
have any album art, yet Quicksilver does display it.  Clearly it's in
the file somewhere...can anyone help me with this?