For the last month or so, I've been having a problem -- intermittently, when I switch desktops using Ctrl+Alt+arrow key, I find that on the new desktop all applications behave as if the Ctrl key is stuck, constantly pressed down. For instance, if I start scrolling the mouse in Firefox, I will start zooming in and out on the page.
Experimentally, I can usually clear the stuck key by switching back and forth to another desktop a few more times.
Has anyone else encountered this?