phatch crashed with ImportError in /usr/share/phatch/phatch/lib/thumbnail.py: No module named PngImagePlugin

[Thalis]

Phatch Photo Batch Processor doesn't start (Ubuntu 13.04)

ProblemType: Crash
DistroRelease: Ubuntu 13.04
Package: phatch-cli 0.2.7.1-1
ProcVersionSignature: Ubuntu 3.8.0-12.21-generic 3.8.2
Uname: Linux 3.8.0-12-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.9.1-0ubuntu1
Architecture: i386
CrashCounter: 1
Date: Tue Mar 12 22:05:50 2013
ExecutablePath: /usr/bin/phatch
InstallationDate: Installed on 2012-10-26 (137 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release i386 (20121017.2)
InterpreterPath: /usr/bin/python2.7
MarkForUpload: True
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/phatch -n
PythonArgs: ['/usr/bin/phatch', '-n']
SourcePackage: phatch
Title: phatch crashed with ImportError in /usr/share/phatch/phatch/lib/thumbnail.py: No module named PngImagePlugin
UpgradeStatus: Upgraded to raring on 2013-02-15 (25 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Launchpad Janitor (janitor)]

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