Mouse issues with VMWare Fusion and Ubuntu 8.10

I upgraded a Ubuntu VM that I use in VMWare Fusion from 8.04 to 8.10 ("Intrepid Ibex") and was having mouse issues. On a single-click the mouse would act like it was initiating a drag-lock. I could work around it by using the keyboard or rapidly clicking the mouse until it sent a single-click. The solution was to configure the vmmouse driver in xorg.conf.

My xorg.conf mouse configuration originally looked like this:

Section "InputDevice"
        Identifier      "Configured Mouse"
        Driver          "mouse"
        Option          "CorePointer"
        Option          "Device"                "/dev/input/mice"
        Option          "Protocol"              "ImPS/2"
        Option          "ZAxisMapping"          "4 5"
        Option          "Emulate3Buttons"       "true"
EndSection

I changed the driver to vmmouse:

Section "InputDevice"
        Identifier      "Configured Mouse"
        Driver          "vmmouse"
        Option          "CorePointer"
        Option          "Device"                "/dev/input/mice"
        Option          "Protocol"              "ImPS/2"
        Option          "ZAxisMapping"          "4 5"
        Option          "Emulate3Buttons"       "true"
EndSection