03-13-2015 04:41 PM
I enabled the "tap zones" feature in the Synaptics touchpad settings and configured the zones to right click and middle click. I notice that sometimes the zones stop working while tapping and navigating are still ok. It turns out that scrolling with the middle button and the trackpoint somehow prevents the tap zones from working.
A quick fix is to move the cursor using the trackpoint, move it again using the trackpad, then the zones will function normally. However the fix isn't permanent.
I hope that Lenovo / Synaptics will address this small issue in the next touchpad driver update.