Diminished battery life since 10.6.5 update

I updated my computer with the OS X 10.6.5 update when it came out a week or two ago and since the update, my battery life has gotten incredibly short compared to what it used to be. Normally, without having Airport on, just using Microsoft word, I would easily get 7 hours of battery life. Since the update, with 100% battery I'm getting 3.5 hours at the most and it's down to 75% within 20 to 30 minutes. Oh and I've had the computer for about 3 months. Battery health is already down to 92%
I'm beginning to think I just got a buggy computer because I've been having trackpad issues, and my USB ports don't recognize printers, no matter what I do.
Any idea's on my battery problem? I have searched and searched the internet and have found nothing so it may be an isolated issue.

This sounds exactly like what My 13 inch (mid-2010) MBP is doing.
From day one (about 4 months ago), the battery showed that it was down to 92% with coconut battery? I've never gotten over about 6 hours of battery life; after this latest update to .5, I'm lucky if I get 3.5 hours of battery life.
I've checked the activity monitor and nothing is running the CPU excessively, except when I'm watching something in flash, but even if I block all flash, I still get the same battery life. Also, it's always warm on the bottom (even with flash blocked) and the fan runs all the time, too.
I'm not doing anything differently than I did before the update - just have chrome open all the time.
I swear apple is getting lazy with everything software related lately.

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