Sometime after I finished the quests A Blade in the Dark and The Horn of Jurgen Windcaller, the game lost it's battle music. There hasn't been a single note of battle theme in several hours of gameplay. Not even during battles with dragons. The calm, peaceful incidental music just keeps playing away. It's disconcerting, especially when an enemy sneaks up on me and attacks me from behind. The change in music doesn't just amp up the battles, it acts as a warning that something's spotted you.
I don't know what's caused this -- it wasn't the 1.2 patch itself, because I've played for a while in the wake of the patch and the music only just decided to take a hike -- but I really hope it's fixed by the "incremental patch" planned for next week. The lack of battle music actually affects the atmosphere so much that I don't even want to keep playing. I started another new character, and that one still gets battle music... but for how long? And I really don't feel like investing another 75 hours in this new character just to have it bug out too.
Please, Bethesda. Fix your game! It's a damn shame that Fallout 3 and New Vegas are still so broken on PS3, don't let Skyrim go down the same road.