package libgl1-mesa-glx 7.10.2-0ubuntu2.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

[whitis]

sudo apt-get update
sudo apt-get --download-only dist-upgrade
sudo apt-get --dry-run dist-upgrade (no errors)
sudo apt-get dist-upgrade (error popped up)

This was during an upgrade from 11.04 to 11.10. Except I forgot to set the distribution to 11.10 so it made 11.04 current.

Running ATI proprietary graphics drivers. mesa-utils is installed to permit use of glxgears.

Errors were encountered while processing:
 libgl1-mesa-glx
 libqt4-opengl
 phonon-backend-gstreamer
 kdebase-runtime
 amarok
 libgl1-mesa-dev
 libglu1-mesa
 libglu1-mesa-dev
 libqt4-opengl-dev
 libnux-0.9-0
 compiz-plugins-main
 compiz-plugins
 compiz-gnome
 compiz
 nux-tools
 unity
 kdebase-workspace-bin
 libkwineffects1a
 kde-window-manager
 kdemultimedia-kio-plugins
 khelpcenter4
 kscreensaver
 kscreensaver-xsavers
 ksnapshot
 kstars
 libwxgtk2.8-0
 vlc
 xorg

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: libgl1-mesa-glx 7.10.2-0ubuntu2.1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
Date: Wed Nov 9 01:00:16 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
ErrorMessage: subprocess installed post-installation script returned error exit status 2
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
SourcePackage: mesa
Title: package libgl1-mesa-glx 7.10.2-0ubuntu2.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2
UpgradeStatus: No upgrade log present (probably fresh install)
version.compiz: compiz 1:0.9.4+bzr20110606-0ubuntu1~natty2
version.ia32-libs: ia32-libs 20090808ubuntu13
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2.1
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4.1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7.2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

[whitis (whitis)]

ATI driver appears to be at 11-5.
/dist/ati-driver-installer-11-5-x86.x86_64.run

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.