Power oscillates between 99% and 100%  every two seconds;

The MagSafe adapator flashes from green to orange and back 30 time a minute. The menubar percentages changes in sync from 99% to 100% and back. This has been going on for a couple of weeks. No other unusual behavior has been noted.
I have done an SMC reset and calibrated the battery (charge completely for two hours then discharge completely and allow to rest for over five hours then charge completely again). Flashing behavior is still there with both of my two MagSafe adapters.
What's going on?

I had some kind of weird issue going on with charging and computers getting hot and turning off, etc., and I did the re-sync thing with the battery...it seemed to fix it and I haven't had an issue yet. I don't know if you said you already tried this or not, but this was handy:
1. Calibrating the battery: http://docs.info.apple.com/article.html?path=Mac/10.4/en/mh2339.html
2. Re-setting the SMC (only do if restarting doesn't help--read the article) http://support.apple.com/kb/HT1411

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