The keyboard shortcut to go to the spaces on the right works, but the keyboard shortcut taking you to spaces to the left does not. Is this a known bug? (It shows as enabled under System Preferences.) I called Apple and they said it was my system so they had me reinstall Yosemite. Since this was going to take a while we ended the call. But I still have the problem. It was working before the first update to Yosemite. Does anybody know? Please advise, thank you.