I have Kernel for powerusers installed (v49).

With QCPUFreq i change the CPU speed when i need to.
Most of the time i let it on default but overclocked:

Min CPU: 250 MHz
Max CPU: 900 MHz
Scaling Gov: ondemand
Smart Reflex: enabled

Everything was fine but all of a sudden (after a week) it started changing by itself.
i can set any speed i want but after 5 minutes or so it sets itself to this:

Min CPU: 500 MHz
Max CPU: 805 MHz
Scaling Gov: conservative
Smart Reflex: enabled

I had this problem before. i thought i did something wrong so i reïnstalled power kernel.
Now the problem returned...

I do remeber there were updates for the battery-patch.
Could this have something to do with it or what could i do to prevent this from happening again?