Hmmm...Heat related you say...
I could SWEAR that my Macbook 2,1 Atheros wifi issues were heat related as well... I lose packets like mad on 10.5 if my ambient room temp is anywhere above air-conditioned 75F/24C or lower...
WTF is with wifi and heat issues...can't anyone make a reasonable wifi chipset nowadays?
Under Linux (any driver, madwifi or ath5k) the card just...stops... I feel that OSX10.5 constantly 'resets' the card, which is often the only way I'm able to get it working again under Linux..suspending the laptop and resuming..
Great way to "fix" a problem chipset A****le er Apple
Biting the hand that feeds IT
