10.3.8 update sets off Mac fans... literally

i've had this problem - it happens when viewing flash files in safari - fans kick up and are really annoying. i just set to "highest" - hope this fixes things...

i have too had this issue, and wondered what the hell it was, since i've never heard my g5 do that, EVER. for me it happened when i was importing a cd into itunes, and trying to run virtual pc at the same time. i hope they fix this.

keep losing connection to my wireless router, then when i switch airport card off and back on i cant see the router until i reboot it. then i can connect again. other macs running 10.2 and windows pc seems fine.

I haven't had the fans blow really hard since I updated, but yesterday night and this morning, the fan sound, while relatively low, was pulsating for a short while with a period of 2-3 seconds, which is kind of annoying.

I am having the same problem with a Rev B G5 2Ghz DP. The fan runs fast for 4 or 5 secs when I start an application, or when I scroll down a web page fast with the scroll wheel. Hopefully, they will fix it soon.

When it says "G5" does that include the iMac G5 or is this limited to just the Power Macs?

MacFixIt mentioned that setting the processor performance to "Highest" rather than "Automatic" in System Preferences/Energy Saver/Options fixes it and it worked for me - I guess some of those who don't notice any fan effect from 10.3.8 may already have this preference set to "Highest". I don't understand why the fans would need to run more at "Automatic" than at "Highest" though! I guess Apple may eventually fix this in Tiger.

If anything I've seen fan reving decrease significantly since the update. The machine is much quieter. Its a dual 2.5ghz.

I definitely noticed this with my 2.5DPG5.

This was actually a problem before the update. :)