I have an HTC Desire Android phone and have been a bit annoyed by one little glitch with the music player.  It seems that only some of my music is showing up with album art.  On my PC, about 98% of my music has album art.  I realize this doesn't effect the listening experience, but it does take away from the overall experience of a polished device/software.

After scouring the internet, I found lots of people with similar problems and no one with a solution that would work for me.  I decided that the issue had to be with the way that the files were tagged.  I typically use iTunes on my PC to organize and manage my music and I use Double Twist to synchronize the music to my phone.  I decided to let another application have a peak into the files in question.  I grabbed a copy of Media Monkey and looked at the tags using it.  After scrutinizing and comparing working files with non-working files, the only thing I could determine was that the album art in the non-working files was showing up with "Image Type" set to "Cover (Front)", while the working ones were set to "Not specified".  I changed the non-working file to "Not specified" and transferred the updated file to my phone and viola, album art.  Seems like maybe the Android music player is not paying attention to all tags, or perhaps "Image type" is not a standard tag, I don't really know the standard so I can't say who is at fault.  I believe the cause was iTunes and it's feature to automatically get album art, but I can't be sure.

Here's how to do it:

1. Open Media Monkey and point it at your music library.
2. Navigate to the song(s) that are not showing album art on the Android.
3. Right click on the songs and select "Properties".
4. Go to the Album Art tab.
5. If the album art "Image type" is set to anything but "Not specified" then you will need to change it to "Not specified".
6. Make sure that  "Apply to selected tracks" is checked.

That should fix the problem.  See the images below for screenshots of what you are looking for.

This is what you will see if it needs to be fixed.

This is after it has been changed.  Don't forget the checkbox.