Small issue, this one.

The music doesn't change when on the overworld anymore... If I load a game, start a new one, or go to the menu while playing, it will play the menu music on the world map. If I go into battle, after exiting the battle, the battle music will continue to play.

Not sure how that happened

<edit> And not only am I not sure how it happened... I'm not sure how it restored itself, either... all of a sudden, 50 or so turns later, and everything is changing properly... Eh, computers.