https://bugs.launchpad.net/ubuntu/+s...ty/+bug/958174

Me and my bugs. I've confirmed it. Whenever I boot up or restart Unity, I have to unplug my USB mouse, then plug it back in before it's recognized. My mouse: Logitech, Anywhere MX.

If anyone else has been affected by this bug, be sure to go to launchpad and add yourself to the list.