Switching VTs works for me using ctrl+alt+f#. I can't figure out which setting is allowing me to do it, if any. "Grab keyboard when active and focused" wasn't it. I've had to use this to kill spicy a few times as if you fullscreen a guest (on my install, at least) you can't get out.
I wasn't aware the spice packages in Gentoo were so out of date, though.
