I got this idea today when I was sitting in my livingroom and the sun went behind the clouds and then the livingroom went abit more dark. That's when I thought, damn brightness bug, BIS should fix this soon.
So here's the followup for the OFP topic which was great fun.
You know you have played too much ArmA when:
You think it's brightness bug when the sun goes behing the clouds.
Add your own!