Is music artwork transferred?
If you add your own album artwork to an album, it is included with the music files when transferred, but only the latest Nokia products will display this artwork. Artwork that is automatically downloaded from the iTunes Store is not transferred.”And the metadata, including artwork, is preserved, but will only display on the latest Nokia devices – to my knowledge, this would be the current generation of N-series only (eg, N95). However if you don’t have one of those phones and still want to see some metadata I will update Plus Music Fixer (it will require a change to support the .mp4 extension NMT applies, and some detection to make sure it doesn’t try to edit videos).
If you add your own album artwork to an track in iTunes, it is included with the music files when transferred. Artwork that is embedded in the iTunes Plus files is also transferred. Artwork that is added using iTunes get album artwork feature is not transferred. Support for music artwork by devices varies, particularly artwork added by other 3rd party applications.