[Acer Aspire One D250] Pointer position jumps to top of screen when using synaptics touchpad

When a finger is near the bottom of the touchpad the pointer will sometimes jump in position vertically to the top of the screen. This happens because as a contact moves down the touchpad, the y coordinate values reported by the hardware gradually descend to 0, but near the bottom they suddenly jump up to values greater than 8000, which is outside the range of acceptible values as specified by synaptics. The driver inverts the y coordinate to map it onto the standard Linux coordinate system (which places 0 at the top of the touchpad instead of the bottom). The result of this calculation causes a sudden jump in the values reported to userspace from a large positive value to a large negative one, resulting in the sudden vertical motion of the mouse pointer towards the top of the screen.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-24-generic-pae 3.2.0-24.37
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic-pae 3.2.14
Uname: Linux 3.2.0-24-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC272X Analog [ALC272X Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC272X Analog [ALC272X Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: ubuntu 1603 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0x58340000 irq 46'
   Mixer name : 'Realtek ALC272X'
   Components : 'HDA:10ec0272,1025022f,00100001'
   Controls : 17
   Simple ctrls : 9
Date: Fri May 18 08:02:53 2012
HibernationDevice: RESUME=UUID=5bd4e7e5-a089-46ea-b233-c3a9cc5fa5dd
MachineType: Acer Aspire one
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US
 SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic-pae root=UUID=8d07e12e-cb3a-41d2-8a3c-6e3856ebd29a ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.2.0-24-generic-pae N/A
 linux-backports-modules-3.2.0-24-generic-pae N/A
 linux-firmware 1.79
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/19/2010
dmi.bios.vendor: Acer
dmi.bios.version: V1.26
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Aspire one
dmi.board.vendor: Acer
dmi.board.version: V1.26
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.26
dmi.modalias: dmi:bvnAcer:bvrV1.26:bd01/19/2010:svnAcer:pnAspireone:pvrV1.26:rvnAcer:rnAspireone:rvrV1.26:cvnAcer:ct10:cvrV1.26:
dmi.product.name: Aspire one
dmi.product.version: V1.26
dmi.sys.vendor: Acer