Alternating LEDs on MBP Power Adapter

Hi,
Just before New Year I noticed that my adapter's charge LED had started alternating between green and orange every two seconds or so; I'd left the MBP to recharge over lunch. Since then it's continued to do this once the battery reaches full charge. The various OS indicators of battery charge (menu bar battery icon, System Profiler's Power Information etc) all switch every ten seconds or so between 'charging' and 'charged'.
There's a few similar stories like this in the discussion list; anyone else seeing this behaviour too?
I've tried resetting the SMC, but this didn't fix the problem. I have not tried resetting PRAM, because others who have tried this have not reported success.
My battery has run 37 charge cycles according to System Profiler and CoconutBattery. Current capacity is around 80%.
Here's my system settings:
MacBook Pro, 2GHz Intel Core Duo
1GB RAM
OS X 10.4.8
Boot ROM Version: MBP11.0055.B08
SMC Version: 1.2f10
Matt
MacBook Pro Mac OS X (10.4.8)

Well, I've received and calibrated my replacement battery, and all now seems well. No more alternating LEDs, so I guess the duff battery's behaviour was confusing the charge routine somehow. If you're getting alternating LEDs, I'd suggest checking that your battery is eligible for exchange. The road goes ever on...
Actually, I did notice on the old battery that a very slight gap had appeared between the metal bottom plate and the plastic shell at one corner. A careful sniff revealed that something (very faint) was coming from this gap, so good thing I exchanged the battery when I did.
Back to work and play.
Matt
MacBook Pro Mac OS X (10.4.8)

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Message was edited by: tleonardi

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