Music covers aren't shown correctly I have copied my mp3 files to my new Google Nexus 7 (Android 4.2.1) via USB into the Music folder. It can be played with Google Play Music (version 4.5.910l.560208), but it is always showing one and the same cover for any track. This problem also shows up with other music players such as Rocket player. In VLC and iTunes on my PC the mp3 covers are just displayed fine!

Do I have to change something on my mp3's in order to display the covers correctly on that device or is there some kind of bug in the mp3-decoder? I couldn't find such a problem report in the web, so my assumption would be that there might be something wrong with my mp3 files.

Thanks in advance ...
iTunes and Windows Media Player encode album art into the song file's metadata.  Googly Play Music uses an 'old hat' method for adding album art.  Linux or WinAmp users know about this.

In your Album directory drop the image of the album in the directory and rename as "AlbumArt.png" or "AlbumArt.jpg".  (Note the capitalization).

Google Play Music should pick it up, if not the artwork may not have fully synced.  Try resetting your droid and it should re-sync. :)