I just downgraded my iBook G3 600 from Tiger to Panther to see if it would increase the machine's performance. I did a clean install of Panther, upgraded to 10.3.9, and now for some strange reason, when I boot the machine (even cold) the fan comes on and constantly runs, which it never did before. However If I wake the machine from sleep the fan doesn't come on -- it only happens from a full boot-up (every time). Any tips on how to fix this? Thanks.