Had an odd problem pop up. Downloaded some songs off of here, imported them into the DLC folder. No problems. Log in to the game, queue up the song, tune the guitar, and then all I get is the amps in the background. I can hit a string and it shows (and makes audible noises) on screen, but the game never progresses any further. It isn't loading the notes, playing the background music. Just sits there. If I play a base game song, it behaves just fine.