Okay, I thought this was related to Gtk's kinetic scrolling support, but it looks like it's still handled by Synaptics, from what I can observe with xev.
** Package changed: gtk+3.0 (Ubuntu) => ubuntu ** Package changed: ubuntu => xserver-xorg-input-synaptics (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/930938 Title: Kinetic 2-finger scrolling no longer works after upgrade to 12.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-synaptics/+bug/930938/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
