evdev creates mouse "jaggies"
 

I've got a Logitech V200 wireless optical mouse. It has a tilt scroll wheel.

For some reason, only one of the tilt buttons shows up if I am using the "mouse" driver and either "ExplorerPS/2" or "ImPS/2" as the protocol. However, I can use the evdev driver and get all of my buttons.

The problem that I am having now, is when I drag the mouse (to draw, for instance) instead of a smooth diagonal line, I get several vertical and horizontal lines representing what should have been a diagonal line. Is there a fix for this, and how new is the evdev driver?