I just installed OS X 10.9 on my mid-2010 mbp and my trackpad gestures aren't working. I can't swipe between pages or scroll up and down in Firefox, Chrome, finder, etc. Scrolling only works in Safari. I've tried switching from 3 to 3 finger swipe, etc., with no luck. Anyone else having this problem? BTW: I also installed it on my 2012 iMac and gestures are working normally.