Lucid memory leak, proprietary driver

I am having Lucid Lynx lock up on me after a period of normal use. It appears to be running out of memory (by my untrained eye looking at the dmesg) but I am /surely/ not running enough applications to consume my 3GiB of memory. I am running compiz with the proprietary nvidia driver.

*The problem appears similar to bug 865981* but I am using the proprietary driver so it cannot be GEM related.

Attached is everything I could find related to this.
http://pastebin.ubuntu.com/420819/

This is definitely reproducible after a period of time, so I can gather more information if necessary.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-21-generic 2.6.32-21.32
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-21.32-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-21-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: anthony 1671 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf6ffc000 irq 21'
   Mixer name : 'SigmaTel STAC9228'
   Components : 'HDA:83847616,1028022e,00100201'
   Controls : 28
   Simple ctrls : 18
Date: Thu Apr 22 23:48:59 2010
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100226)
MachineType: Dell Inc. XPS M1530
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-21-generic root=UUID=477a9e8c-1632-4e9b-b9ee-57d71e66c939 ro quiet splash
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34
SourcePackage: linux
dmi.bios.date: 11/19/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A12
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA12:bd11/19/2008:svnDellInc.:pnXPSM1530:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: XPS M1530
dmi.sys.vendor: Dell Inc.