If the option to generate album art thumbnails is disabled, so there are no thumbnails in the "Thumbs\Music" folders, then the display of the album coverart located in the "folder.jpg" file varies depending on the setting of the "Show visualisation (BASS player only)" option, or the setting of the Visualizations option.

h4. Steps to Reproduce
1. Delete any thumbnails in the "Thumbs\Music" folder (to simulate that the option to create thumbnails in MediaPortal Setup was unselected)
2. Select the BASS player as the music player
3. Select a visualisation in MediaPortal Setup -> Music -> Visualizations tab
4. Select the option "Show visualisation (BASS player only)" in MediaPortal Setup -> Music -> Now playing tab
5. Ensure that there is a "folder.jpg" file in the album folder to be played in My Music
6. Play the album and notice that the album art is displayed correctly in the "Now playing" screen

7. Now disable the option "Show visualisation (BASS player only)" in MediaPortal Setup -> Music -> Now playing tab OR select "None" in the Visualizations tab.
8. Play the same album again, and this time the cover art will NOT be diaplayed, even though a valid "folder.jpg" exists.

h4. Additional Information
http://forum.team-mediaportal.com/missing_cover_art_now_playing_my_lyrics-t23590.html?t=23590