For m and o, hitting the 'space' bar when MA is full screen has caused the simulation to pause. Only by hitting 'F' and going into Windowed mode brings the 'space' bar back to it's 'Settings' functionality. Is that just me?
I can't replicate it either - running Windows 7-32. Space bar always brings up settings panel.
What version of Windows are you using? Anything unusual in your program settings or ??