GAZMAN  By keeping the operating temperature lower, it shouldn't get to the point where the heatsink is expanding so much that it makes contact with the sensor cable, causing the short circuit.

Having said that, I've had my heatsink replaced under warranty. I still installed this update. The fans seem to be spinning slightly faster at idle, which should keep temps down.  
(Version 1.1)

SJJ_PUBLIC  Are we sure the issue really was the heatsink? Certainly that *seemed* like a solution, but perhaps it was not the real solution or a complete solution? Perhaps replacing the heatsink only reduced the problem, with the underlying problem remaining, such that given enough high processor use it would still shut down, just requiring more than before. This is purely speculation on my part, mind you, but Apple is recommending firmware update 1.1 even for those who had the heatsink replaced (indeed, even for those with MacBooks not exhibiting the problem now.) I think it's safe to say that you should install this update. FYI, I installed it on my MacBook which was not exhibiting the problem and have seen no problems with it.  
(Version 1.1)

NYMPHE  Actually, I think this firmware update simply bypasses the shutdown problem. I ve seen lots of pictures, in which the cable was melted enough. Ok, fine, I am going to install it, but how should I know if my cable burns and mets inside?

If I had the RSS problem, I wouldn't use this firmware, because I couldn't demonstrate the problem again. And I don't want a notebook which has got some loose wires...  
(Version 1.1)

GREENIE  Incase your wondering this will only fix the issue most of the time. It doesn't always fix the issue and if the issue is not fixed then you actually need the heat sink.   
(Version 1.1)

BEDOUIN  "I know most of the macbook users know what im talking about)...."

No, we don't.

Three of my friends have MacBooks; none have the moo'ing I hear complained about on the Internet non-stop.  
(Version 1.1)

UZKU  thats because they probably have new

If they have early versions like mine, then they should definately know what Im talking about, its a bug and apple had to fix it, it did exist  
(Version 1.1)

D9  More or less?  
(Version )

RDN2  More. Not a lot but I seem to need the volume a click or maybe 2 lower than before the update.  
(Version )

MACBULLET  SMC i believe is System Management Control  
(Version )

JORY  The updater told my that my 17" MacBook Pro was not in need of this SMC updater.  
(Version )

GAZMAN  Apparently its not just for the moos, it also makes the MacBooks run significantly cooler, especially at idle.  
(Version )

ZORG  I agree. The quiet MacBook now has a constant fan noise (though I wouldn't call it noise -- a very faint white-noise). Only really noticable when in absolute quiet. AND my MB does run cooler (was between 65 and 75C -- now constantly less than 58C; using CoreDuo Temp).  
(Version )

LUTHER  gazman - with the fan running all the time, yes, it should run cooler. But notebooks are designed to handle a little heat, and Apple originally designed the MacBook that way, so is it necessary to run the fan all the time? No. Apple is forced to make the fan all the time as the only solutioin to fix the mooing in certain MacBooks.

The question is, do you want to put up with the noise of the fan running all the time? I work in a silent environment and prefer it to stay that way.  
(Version )