I spend countless hours with the program MP3Tag adding album art and correcting tags on my collection of MP3s. All MP3s play fine on my computer and on my 2 MP3 players and 2 Android smartphones. I have a Pioneer DEH P6000UB that can play MP3s off a jump drive. Now some, but not all of the MP3s I added album art to will not play on my car stereo. If I go back in and remove the album art, the file will play fine. I have tried a couple of other MP3 tag programs to add album art and get the same result. What is happening and how do I fix the album art so I can keep it, and it will play? Why does it only affect some and not all MP3 files?