Ctrl+F also takes a screenshot and saves it in
My Documents\My Games\Gas Powered Games\Forge\screenshots
but they will be sized-down. You can use PrintScrn but you have to go to an image editor as verspunken said, and you can only store one at a time (you have to alt+tab and save it every time you take one).
About the bug: if you are talking about the scoreboard, I think it is already well-known.