Dell desktop, Logitech wireless keyboard, Ubuntu 11.10.
Yesterday my right and left control keys got (re/un)mapped, but I'm not sure by what. Now, whenever I press either one, a red "pulsating" red circle flashes under the pointer and then returns to normal. In Ubuntu this is the only sign that something has changed. However, in Virtualbox with a Windows guest, nothing that uses the control key will work. I'm not sure what changed it or where to look for how to change it back.