Ubuntu, Unity, 14.10

When I'm using Google Docs in Chrome, as soon as "All changes saved to drive" appears at the top of the document, the keyboard stops responding. Everything else, the mouse, touchpad, etc, all still work and applications respond as normal to mouseclicks, just the keyboard does not respond in any application or window. The only way to fix it is to restart the computer.

It does NOT happen in Google Sheets. I haven't tried any of the other Google office products.