That is bizarre! I really don't know how else to help you. since you believe you have narrowed it down to the temperature, I cannot help too much, since that isn't really my specialty.
Wish I could do something else for you.
There must be something in your physical system that could either be reacting differently to the cold or could be "told" by the computer to react a certian way. Maybe some temperature sensor is going haywire when coldness comes in. I highly doubt the computer actually has a temper against the cold; rather, a malfunctioning sensor could be the cause. I can see this telling some of your components to refer to failsafe's to prevent damage to the computer in the case of "extreme" temperatures. But this is a problem I have no clue how to alleviate or even to affirm! That would require tedious testing, special tools, and crawling around inside the case to find which sensor is actually the cause.
Either way, a very strange occurrence, indeed!
Edited by HamSandwich, 24 February 2009 - 03:44 PM.