missing artwork on 'now playing' option.

Hi,

Noticed recently that the 'now playing' option in my ipod classic menu is missing its artwork. Artwork appears everywhere else on the ipod so in general it's fine, but it no longer appears for any album in the 'now playing' option. The track details appear, but not the artwork. I'm sure that it used to appear there. Is this a new problem? (I think it used to be fine - have only noticed it recently.) Is it possible to fix it?

Thanks people!!