Replaced battery; won't charge beyond 27%. Some settings lost on restart

I recently took advantage of Apple's replacement program for overheating PB batteries, although I hadn't experienced any actual problems. After I installed the replacement my battery won't charge past 27%, plus the date and time reset to 1969 and my AirPort network settings are lost whenever I restart or shut down.
The power indicator in the menu bar constantly shows ""Calculating."
I've already tried resetting the PMU and allowing the battery to discharge fully.
Any ideas?

And now for the good news…
The Genius Bar at the KC AppleStore was the source of the solution. They diagnosed a bad battery (the one I'd received in the PB battery replacement program) and changed it out. All's well now, including the "disappearing" settings.

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