Ever since buying my MacBook Pro 13, 2.26GHz, Heatsink A has been reading a constant 0˚C in iStat menus. Is this universal, or will I need a replacement? I have only modified the amount of RAM so far, I bought 4GB of RAM from Crucial on Newegg, and I have been using Macs for close to 5 years now. Thanks! EDIT: I just installed the iStat Pro widget, and it doesn't even list Heatsink A as a temperature sensor. I'm going to assume that iStat menus is incorrect in listing it as an option, and that it doesn't exist on any MBP 13.