After installing Mavericks over Mountain Lion, my vertical scrolling is wiggly (jerky) on rMBP.
Similar as in iOS, when scrolling with two fingers on touchpad down or up, a smooth motion "locks" the scroll to vertical scroll only. After upgrading to Mavericks, vertical scroll does not "lock" and will also wiggle horizontally.
This makes scrolling in Chrome and Safari painful because browser will make go back or forward in history when trying to scroll. Occasionally the screen will also jump a few pixels up or down because it's recovering from the horizontal shift.
Any advice ?