gst-plugin-scanner crashed with ValueError: bad marshal data (unknown type code)

i'm using clementine and gstreamer crashes.

ProblemType: Crash
DistroRelease: Ubuntu 12.10
Package: libgstreamer0.10-0 0.10.36-1ubuntu2
ProcVersionSignature: Ubuntu 3.5.0-8.8-generic 3.5.0
Uname: Linux 3.5.0-8-generic x86_64
ApportVersion: 2.4-0ubuntu6
Architecture: amd64
Date: Fri Aug 10 11:20:58 2012
ExecutablePath: /usr/lib/x86_64-linux-gnu/gstreamer0.10/gstreamer-0.10/gst-plugin-scanner
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
ProcCmdline: /usr/lib/x86_64-linux-gnu/gstreamer0.10/gstreamer-0.10/gst-plugin-scanner -l
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=it_IT.UTF-8
SourcePackage: gstreamer0.10
Title: gst-plugin-scanner crashed with ValueError: bad marshal data (unknown type code)
Traceback: ValueError: bad marshal data (unknown type code)
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dialout dip lpadmin plugdev sambashare sudo