I installed synapse on my Cinnamon desktop, and everything worked with the keyboard shortcut Ctrl+Space. Then, at some point, it stopped working properly, and I had to hold down Control and hit space twice. Now it isn't working at all. Control-space seems to make the current window go out of focus, but I can't find it in the cinnamon control center.
I would like to know how to disable it for use with synapse or kupfer, as I don't need this cinnamon Control-space anyway. I run cinnamon 2.0.10, in case it helps.