tracker-extract crashed with SIGSEGV in gst_structure_copy()

This bug appears sometimes when i want update my packages list

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: tracker-extract 0.12.7-1
ProcVersionSignature: Ubuntu 3.2.0-1.3-generic 3.2.0-rc2
Uname: Linux 3.2.0-1-generic i686
ApportVersion: 1.90-0ubuntu1
Architecture: i386
Date: Thu Nov 24 21:47:40 2011
ExecutablePath: /usr/lib/tracker/tracker-extract
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
ProcCmdline: /usr/lib/tracker/tracker-extract
SegvAnalysis:
 Segfault happened at: 0x69eb3bc <gst_structure_copy+108>: mov (%eax),%ecx
 PC (0x069eb3bc) ok
 source "(%eax)" (0x00000060) not located in a known VMA region (needed readable region)!
 destination "%ecx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: tracker
StacktraceTop:
 gst_structure_copy () from /usr/lib/libgstreamer-0.10.so.0
 ?? () from /usr/lib/libgstreamer-0.10.so.0
 _g_type_boxed_copy (type=162196248, value=0x9dbdfc8) at /build/buildd/glib2.0-2.30.1/./gobject/gtype.c:4225
 boxed_proxy_collect_value (collect_values=<optimized out>, value=0xbfeddbfc, n_collect_values=<optimized out>, collect_flags=<optimized out>) at /build/buildd/glib2.0-2.30.1/./gobject/gboxed.c:228
 boxed_proxy_collect_value (value=0xbfeddbfc, n_collect_values=1, collect_values=0xbfeddbb8, collect_flags=0) at /build/buildd/glib2.0-2.30.1/./gobject/gboxed.c:213
Title: tracker-extract crashed with SIGSEGV in gst_structure_copy()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare