To quote, roughly translated: Italian developer Alexander of PS3Mod updated Control Fan Utility to version 1.8.1. See below for the changelog.
CHANGELOG CONTROL FAN UTILITY 1.8.1
Added Payload 4.46
Fixed Minor Bug
Fully translated into Italian
Fixed various problems related to an incorrect display of the language ITA (Thanks Dino05)
Update: Updated to PS3 Fan control utility to Version 1.8.1 Fixed, which works on Habib 4.46. Thanks Estwald (Hermes).
Fixed: works on CFW 4.46 Habib and all CFW.
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Estwald released a new more stable version that is cross-compatible with many cfw's. Seems this is more compatible with older ps3's. Ideal for fatboys, but there are still compatability issues with slims.
its not written for 4.41... read the headline. The risk of brick with every new firmware is enough for me to play around with. Heat is NOTHING to play around with. I have to pass on this one... And if he does integrate this into Iris, I will have to just compile my own versions with this disabled. Its a neat trick... but so is thePSVibe