Fans on all the time

PB 17" 1.5ghz / 1GB RAM / 10.3.9
MY PowerBook's left hand side fan seems to be running about 90% of the time now and is also getting louder. The right hand fan seems to run a lot also but it it much quieter.
Right now the fan has been running for hours. I have Safari, Mail and TextEdit open. An external Apple 17" LCD monitor is attached.
I run Repair permissions, clean out caches and use macjanitor about once every three weeks, I also leave it on overnight, at least once a week to let the Mac Os run its cron scripts automatically.
The laptop is 10 months old.
Current micro environment (office): Air temp: 23ºC Humidity: 68% Surface: Wooden Veneer Desktop, Rear of laptop raised about two cm with plastic strip with 5mm wide top surface which the laptop rest on.
Is the fan thing normal? And i there a way to reduce the fan time?

I had the same problem, but after I got rid of something called prntmanager, using 95% of the CPU, the fan is normal again, meaning it hardly ever comes on. This constant fan happened after I installed CS2, and I do have 1gig of RAM
My question now is I have some things using several gigs in the real memory column and I don't know what they are. Could I get rid of them?
Mike
http://www.mikeadams.org

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