I have tried to capture a screenshot with both Shutter and GIMP, and it does not work.
When I use Shutter, I get a grey background image with the Shutter program's icon tiled across and down it.
When I use GIMP, I get a solid black image.
I did search for this using Google and also here on FedoraForums, but I basically found nothing relevant, or certainly remotely close to up-to-date.
I have not yet tried troubleshooting this because, to be honest, I haven't the foggiest where to begin.
Anyone here have any ideas?