Since upgrading to xorg-7.3, I've had problems with the ALPS GlidePoint touchpad
on a Sony Vaio PCG-Z505SX.  Mostly it works OK (mouse movement, the two buttons
and tapping the touchpad are all normal), however, from time to time, the mouse experiences sequences of fast, erratic movement and apparent touchpad taps, when all I'm doing is moving the mouse.  This erratic movement and taps can cause menus to open, text to be selected or windows to raise or focus depending on where the random movement took the mouse.  It is very annoying.

Everything was 100% perfect using xorg-6.9.

I have tracked this down to xorg-7.3 appearing to consider this touchpad as having a ZAxis wheel and interpreting occasional X/Y motion sequences as Z input and taps.  Thing is, the PCG-Z505SX has no mouse wheel.

The default ZAxisMapping is "4 5", but Button4 is also used for touchpad taps and is mapped to Button1, and this appears to be why I am seeing the erratic behavior.   Setting "Option ZAxisMapping "6 7""  appears to eliminate the problem as Button6 and Button7 are not used.  But this is a work-around, not a fix.

The xorg mouse driver appears to be mistakenly thinking this device has a ZAxis when, in fact, it does not.

I am using FreeBSD-7.0 with moused(8) and the xorg mouse configured thusly:

Section "InputDevice"
        Identifier  "Mouse0"
        Driver      "mouse"
        Option      "Protocol" "auto"
        Option      "Device" "/dev/sysmouse"
        Option      "ZAxisMapping" "6 7"     # added for xorg-7.3
EndSection

moused(8) is configured like so:

/usr/sbin/moused -3 -m 1=4 -a 1,1.2 -A 2,4 -p /dev/psm0 -t auto