Abnormal heating after SMC update 1.8

Hey guys,

yesterday I upgraded SMC firmware to version 1.8, but since then my Macbook Air never gets under 50 C. I was used for temperatures around 39 C when running only internet webpages, or viewing PDFs, but now I hardly get close to 50 C when doing the same. When I`m watching videos on Youtube, I now reach temperatures around 80 degrees:-/

I`m using smcFancontrol to check the temperature.

Do you have any idea why is it so and how to correct it? Thanks a lot!