Does your RPi freeze?

[comstyle]

My pi is freezing immediately when I switch the source/input of my tv or turn it off (LG 32 LH3000).
It doesn't matter if cec is activated or not.
I played with the peripheral settings and xbian force hdmi settings but the pi still freezes.....
When I switch back to the pi's hdmi input on tv, I see xbian with frozen clock.
By pushing a button (lg remote/yatse) it often starts fast forwarding the notifications at the bottom and shows in a short period of time a notification of what happened since freezing. The clock jumps to the correct time and everything works well again.
(Sometimes I have to pull ac to reboot because yatse and cec don't work/connect)
This problem has started a few weeks ago after updating.

I hope someone got any ideas.
Thx in advance