I copied DRM-free MP3 files from my retired Droid that had played just fine on the Droid onto my computer, and then copied them onto my Charge. The files and MP3 tags are seen on the Charge since it knows about all of the artists and albums, but when I try to play them through the included Music Player app, on every track I get the message "Sorry, the player does not support this type of audio file", and if I try to play them with the Google Music app, I get the message "Error playing the requested track".
If I reboot the phone, the tracks to start playing fine, but at some point they go back to being unplayable.
Any solutions out there? (Other than rebooting?)