IOS 6.0.1 vs 6.1.2? Should I upgrade?

I bought a iPhone and its running iOS 6.0.1 and then I got a update notification saying there's a new update available (6.1.2). What's the difference from 6.0.1 to 6.1.2?

I just updated mine last night. I don't even notice anything different.

No difference that I've noticed. It was something stupid in the calendar app that was using battery power unnecessarily or something…

Bug fixes and improvements mainly. Important enough to get.

Yes when ever there's an update you should update.

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