bamfdaemon crashed with signal 5 in XGetWindowProperty()

Release of Ubuntu: 13.04
Package Version:Installed: 0.4.0daily13.01.11-0ubuntu1
Expected Results:
Actual Results:

Hallo
I was using contemporarily, transmission, virtualbox, isomaster and brwsing files, then the crash occours.
Thanks
Fabio

ProblemType: Crash
DistroRelease: Ubuntu 13.04
Package: bamfdaemon 0.4.0daily13.01.11-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-2.6-generic 3.8.0-rc4
Uname: Linux 3.8.0-2-generic x86_64
ApportVersion: 2.8-0ubuntu2
Architecture: amd64
CrashCounter: 1
Date: Tue Jan 29 17:10:40 2013
EcryptfsInUse: Yes
ExecutablePath: /usr/lib/x86_64-linux-gnu/bamf/bamfdaemon
InstallationDate: Installed on 2012-10-12 (108 days ago)
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20121011)
MarkForUpload: True
ProcCmdline: /usr/lib/x86_64-linux-gnu/bamf/bamfdaemon
Signal: 5
SourcePackage: bamf
StacktraceTop:
 XGetWindowProperty (dpy=dpy@entry=0x22131c0, w=w@entry=81788931, property=property@entry=295, offset=offset@entry=0, length=length@entry=9223372036854775807, delete=delete@entry=0, req_type=req_type@entry=4, actual_type=actual_type@entry=0x7fffdf5835d0, actual_format=actual_format@entry=0x7fffdf5835cc, nitems=nitems@entry=0x7fffdf5835d8, bytesafter=bytesafter@entry=0x7fffdf5835e0, prop=prop@entry=0x7fffdf5835e8) at ../../src/GetProp.c:61
 _wnck_get_atom_list (screen=<optimized out>, xwindow=81788931, atom=atom@entry=295, atoms=atoms@entry=0x7fffdf583648, len=len@entry=0x7fffdf58363c) at xutils.c:495
 update_state (window=0x233cc20) at window.c:2710
 force_update_now (window=0x233cc20) at window.c:3234
 update_idle (data=0x233cc20) at window.c:3263
Title: bamfdaemon crashed with signal 5 in XGetWindowProperty()
UpgradeStatus: Upgraded to raring on 2012-10-13 (108 days ago)
UserGroups: adm audio cdrom dialout dip disk fax fuse kvm libvirtd lpadmin netdev plugdev sambashare scanner sudo tape vboxusers video whoopsie