Keyboard controls issue - why is that!?

Hi,

I discovered that when I hold "A" and "Left Arrow" keys, the "UP Arrow" key is not working, even thought I don't have anything programmed for "A". Any ideas why this might be happening?

And just realized that if I hold "L arrow" or "R arrow" + "Down arrow" + D then S is not working. What's going on here? Is there a limit to the amount of keys can press simultaneously in construct? Or is it windows problem, or maybe just node-webkit?

It's just your keyboard.

en.wikipedia.org/wiki/Rollover_(key)

Thanks for info. That's really bad than, as that means other might have that problem too.