Print screen and full screen in Direct3D

[yakul]

I have an application which has a full screen device on the secondary adapter.
When I press print screen, sometimes I get a green screen where the secondary device should be and sometimes I get the correct image.
I was told maybe I am doing something with hardware overlay, but I didn't even know about it before I encountered the problem.
So what may be causing it and should I be worried about that?
Should I use a window covering the entire screen instead of full screen mode in Direct3D?
Thank you.

[Nick]

What graphics card(s), driver(s) and operating system are you using? Multiple adapters quite often suffer from driver issues. Try newer and older versions to see whether the behavior changes.