zim crashed with AttributeError in paste_clipboard(): 'NoneType' object has no attribute 'resolve_images'

I was just random work on it

ProblemType: Crash
DistroRelease: Ubuntu 12.10
Package: zim 0.56-1
ProcVersionSignature: Ubuntu 3.5.0-16.25-generic 3.5.4
Uname: Linux 3.5.0-16-generic x86_64
ApportVersion: 2.6.1-0ubuntu1
Architecture: amd64
CrashCounter: 1
Date: Thu Oct 4 11:25:57 2012
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/zim
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/zim
ProcEnviron:
 PATH=(custom, user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/zsh
PythonArgs: ['/usr/bin/zim']
SourcePackage: zim
Title: zim crashed with AttributeError in paste_clipboard(): 'NoneType' object has no attribute 'resolve_images'
UpgradeStatus: Upgraded to quantal on 2012-08-30 (35 days ago)
UserGroups: adm cdrom dip kvm libvirtd lpadmin plugdev sambashare sudo