Is my temperature monitor working correctly?

Question

i've downloaded the marcel bresink temperature monitor for my macbook.
before the firmware update, it ran at 67 degrees celsius. after the firmware update, it runs at 40's.
when i restarted my computer few hours later, and loaded up the temperature monitor, it gave me a reading of 29 degrees and even with intensive work (where i can feel the heat and the fan working) the temperature monitor still remained at 29 degrees. right now, it seems to be stuck on 25 degrees. i've changed the preferences so that the sensors are updating the temperatures regularly. i've also tried reinstalling it. is there something wrong or am i not noticing something here?
thanks guy!
btw, my new macbook is working great!

Answer 1

It's an Intel processor design fault. I got this info from the Hardware Monitor developer.
Q: I have a Mac with an Intel Core Solo or Core Duo processor.
Sometimes, the temperature readings seems to "hang" and are no longer
being refreshed. Is this a problem with the application?
A: No, this problem is caused by an internal design flaw of current
versions of Intel Core processors. The Digital Thermal Sensors may
stop working when the processor returns from a C3/C4 power saving
state. Intel plans to correct this hardware bug for future steppings
of the CPU.
Intel refers to this hardware problem as Erratum AE18. For detailed
information, please see Intel document 30922204
http://www.intel.com/design/mobile/specupdt/309222.htm
-Bmer
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