Following info posted here https://help.ubuntu.com/community/LucidUpgrades. do-release-update returned the error in question and I opted to report

[Mike]

encountered when upgrading from karmic to lucid. used update manager from command line.

ProblemType: Package
Architecture: i386
Date: Sat Nov 12 18:07:17 2011
DistroRelease: Ubuntu 10.04
DkmsStatus:
 nvidia, 185.18.36, 2.6.31-16-generic-pae, i686: installed
 nvidia, 185.18.36, 2.6.31-23-generic-pae, i686: installed (WARNING! Diff between built and installed module!)
ErrorMessage:
 ErrorMessage: unable to create `/usr/lib/nvidia/libglx.so.xserver-xorg-core.dpkg-new' (while processing `./usr/lib/xorg/modules/extensions/libglx.so'): No such file or directory
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
MachineType: Acer Aspire R3610
NonfreeKernelModules: nvidia
Package: xserver-xorg-core 2:1.6.4-2ubuntu4.3
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-23-generic-pae root=UUID=a1a1a0dd-1f52-4961-ad51-98deac5c4099 ro quiet splash
ProcVersionSignature: Ubuntu 2.6.31-23.75-generic-pae
SourcePackage: xorg-server
Tags: lucid
Title: package xserver-xorg-core 2:1.6.4-2ubuntu4.3 failed to install/upgrade:
Uname: Linux 2.6.31-23-generic-pae i686
XsessionErrors:
 (gnome-settings-daemon:1672): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (gnome-settings-daemon:1672): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (nautilus:1707): Eel-CRITICAL **: eel_preferences_get_boolean: assertion `preferences_is_initialized ()' failed
 (polkit-gnome-authentication-agent-1:1733): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
dmi.bios.date: 08/10/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P01-A2
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: FMCP7A-ION
dmi.board.vendor: Acer
dmi.chassis.type: 3
dmi.chassis.vendor: Acer
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP01-A2:bd08/10/2009:svnAcer:pnAspireR3610:pvr:rvnAcer:rnFMCP7A-ION:rvr:cvnAcer:ct3:cvr:
dmi.product.name: Aspire R3610
dmi.sys.vendor: Acer
system:
 distro: Ubuntu
 codename: lucid
 architecture: i686
 kernel: 2.6.31-23-generic-pae

[Bryce Harrington (bryce)]

Hi Mike,
Hmm... I'm not sure I totally understand your description of the problem. Could you please elaborate and clarify? You may find it helpful to read "How to report bugs effectively" http://www.chiark.greenend.org.uk/~sgtatham/bugs.html or the Ubuntu-X bug reporting guidelines at http://wiki.ubuntu.com/X/Reporting .

[bugbot (bugbot)]

We're closing this bug since it is has been some time with no response from the original reporter. However, if the issue still exists please feel free to reopen with the requested information. Also, if you could, please test against the latest development version of Ubuntu, since this confirms the bug is one we may be able to pass upstream for help.