#4 Unable to read key F0Mn from SMC.

OS X 10.6.2
Windows 7 Ultimate x64
iMac9,1

Here's what the command line spits out:

MacFan Version .65 Build 11.3.2009.4

Checking running processes for conflicting programs...

Number of fans in the system: 3

Reading fan data...

Unable to read key F0Mn from SMC.
If the problem persists, contact developer at sourceforge.net/macfan for help.
Unexpected error: SMC value could not be read