Ubuntu-bug -w produces "xprop failed to determine process ID of the window"

[JohnWashington]

I'm trying to report a problem in PySol, so I run 'ubuntu-bug -w' and click on the window of the application. Every time I do this, regardless of where in its window I click, I get "xprop failed to determine process ID of the window". I'm doing this in 12.04 beta2 daily build of 2012-04-07.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: apport 2.0-0ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-22.35-generic-pae 3.2.14
Uname: Linux 3.2.0-22-generic-pae i686
ApportVersion: 2.0-0ubuntu4
Architecture: i386
Date: Sun Apr 8 19:00:45 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120407)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_GB:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: apport
UpgradeStatus: No upgrade log present (probably fresh install)

[Marcus Tomlinson (marcustomlinson)]

This release of Ubuntu is no longer receiving maintenance updates. If this is still an issue on a maintained version of Ubuntu please let us know.

[Launchpad Janitor (janitor)]

[Expired for apport (Ubuntu) because there has been no activity for 60 days.]