10.4.9 and hot macbook pro battery and fan noise

Since upgrading -- the bottom of the macbook pro 15 is suddenly really hot...I mean, really hot...and the fan keeps coming on -- which NEVER came one with the previous version of 10.4....
Any ideas??

Since upgrading -- the bottom of the macbook pro 15
is suddenly really hot...I mean, really hot...and the
fan keeps coming on -- which NEVER came one with the
previous version of 10.4....
Same problem here, but replying the combo installer didn't do the trick -- before the 10.4.9 update the computer ran nice and cool, and fans only came on under heavy heavy processor load (with 'Fan Control' 1.1 at a medium setting). After the update, even with 'Fan Control' at maximum, the fans were suddenly going most of the time and computer was hot hot hot.
I reapplied the update from the Combo installer, and reinstalled 'Fan Control' just to be sure, but I'm noticing the same problem still -- running almost no processor load and the computer is hot and the fans are whirring.
Anyone have any other ideas? Cheers.
Macbook Pro Mac OS X (10.4.9) 2.16 GHz Intel Core 2 Duo 3GB RAM

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http://www.apple.com/support/macbook_macbookpro/batteryupdate/
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