MacBook Pro (Mac OS X Version 10.7.3) running Parallels Desktop virtual machine (Build 7.0.15094)
Mac: 2.66 GHz Intel Core i7, 4GB RAM
Virtual machine: 1CPU, 768MB
Initial Ubuntu installed automatically from Parallels (11.04 Parallels ISO image), then upgraded to 11.10 (that worked), then attempted to further upgrade to 12.04 (that failed)
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: update-manager 1:0.152.25.9
ProcVersionSignature: Ubuntu 3.0.0-19.33-generic 3.0.27
Uname: Linux 3.0.0-19-generic x86_64
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Sun May 6 14:05:45 2012
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
PackageArchitecture: all
ProcEnviron:
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: Upgraded to oneiric on 2012-05-06 (0 days ago)
Status changed to 'Confirmed' because the bug affects multiple users.