Originally Posted by Raze

Try hitting Left Shift when that happens; holding it enables 'Show Sneak Cones', so if they get stuck on (sneaking when combat starts can sometimes do that), hitting Left Shift can clear it.

Thx, I will try that.

Originally Posted by Raze

If you switch to Windowed or Fake Fullscreen display mode, you can use Print Screen to take screenshots. In Fullscreen mode, you need to use a program designed for DirectX games, such as the function built into Steam, or fraps (though it is primarily for video capture).

I researched a little and ended up with the same result. I just installed fraps, it should also work fine with screenshots, but thank you for that advice anyway.

Have a nice christmas - I missed to wish it earlier :P