Peter Hutterer at Red Hat previously made some big changes to the xf86-input-synaptics driver for supporting new touchpad hardware, mainly on recent Lenovo ThinkPad systems. The bulk of that work was rolled up into the first xf86-input-synaptics driver development release for version 1.8. The second xf86-input-synaptics 1.8 development release is now available.
The xf86-input-synaptics 18.104.22.168 driver disables GrabEventDevice by default, has a few event communication fixes, adds more PnPIDs and DMI matches for Lenovo hardware, and has other basic changes.
More details on this second xf86-input-synaptics 1.8 release can be found via the mailing list announcement. Hutterer has also written a new blog post about the updated touchpad support for Linux systems.