The only way I can manage it without taking a shot of the whole screen (shift-command -3) is by using Grab. When I get to the result window I have to use command + forward key to choose Grab. Use the keys for taking a shot of a window. Now I can use the mouse and click on the button to choose a window and then click on the window in MM.
In earlier days I used ScreenShot Pro. But indeed, I got the same problem. Suddenly (with version MM 1.0.x), using SSP did stop MM. Stop in the sense of pauze during play, but also going to the main menu, when at the Mansion Complete!-screen.
That is why I only use COMMAND+SHIFT+3 now. And if needed, I resize the pic afterwards.
In addition to cmd-shift-3, cmd-shift-4 lets you select a specific region of the screen that you want to capture. And if you hit the spacebar after pressing cmd-shift-4, you can grab the contents of any window you choose. Since you play in a window, this is probably the most convenient option for you.
Hi guys! It sounded so good to try cmd-shift-4 together with spacebar so I tried it at once. BUT I still had to use the mouse to choose the window and this is the result