Battery problems since 10.4.3 update?

I know that there a quite a few threads about battery problems, but has anybody experienced significant decreases in battery life after installing the 10.4.3 update? I installed it a few days ago and I'm noticing now that my battery life is much worse than it used to be.
For example, I was just watching a movie on my iBook. Before I started, my battery was FULLY charged, and Energy Saver was set for "Better Battery Life". I had airport turned off and left the screen brightness at default.
My battery died within 40 MINUTES! I had the sound turned up a little bit but I don't think that would drain enough power to reduce my batter life to 40 minutes when set for "better battery life"....
My battery's less than 2 years old.
Anyone else had similar problems since last OS update?

I just found a useful util called CoconutBattery 1.3 available from :
http://www.coconut-flavour.com/coconutbattery/index.html
Running the app - gives me this info on my battery's state:
current & max capacity: 828mAh
Orginial Capacity: 4400mAh
Battery load cycles: 461
The battery according to this app shows that at max charge it only has 18% of its orginial capacity.
HarjTT

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Welcome to Apple Discussions.
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