package avahi-daemon (not installed) failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

apport error message popped up on login

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: avahi-daemon (not installed)
ProcVersionSignature: Ubuntu 2.6.38-8.41-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
Architecture: amd64
Date: Sun Apr 10 16:44:29 2011
DpkgTerminalLog:
 Can not write log, openpty() failed (/dev/pts not mounted?)
 Can not write log, openpty() failed (/dev/pts not mounted?)
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110330)
SourcePackage: avahi
Title: package avahi-daemon (not installed) failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)