nepomukservicestub crashed with SIGSEGV in malloc()

[BIGNATIUS]

Binary package hint: kdebase-runtime

I just was playing a video in chromium

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: kdebase-runtime 4:4.6.2-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.41-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
Date: Sat Apr 9 19:42:17 2011
ExecutablePath: /usr/bin/nepomukservicestub
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release i386 (20100816.1)
ProcCmdline: /usr/bin/nepomukservicestub nepomukstorage
ProcEnviron:
 LANGUAGE=es_ES:en
 LANG=es_ES.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: kdebase-runtime
StacktraceTop:
 malloc () from /lib/i386-linux-gnu/libc.so.6
 operator new(unsigned int) () from /usr/lib/i386-linux-gnu/libstdc++.so.6
 QMutex::QMutex(QMutex::RecursionMode) () from /usr/lib/libQtCore.so.4
 ?? () from /usr/lib/libQtCore.so.4
 ?? () from /usr/lib/libQtCore.so.4
Title: nepomukservicestub crashed with SIGSEGV in malloc()
UpgradeStatus: Upgraded to natty on 2011-04-08 (0 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
XsessionErrors:
 (nautilus:4514): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed
 (<unknown>:4497): libindicator-WARNING **: Shortcut Group does not have key 'TargetEnvironment' falling back to deprecated use of 'OnlyShowIn' and 'NotShowIn'.

[Apport retracing service (apport)]

StacktraceTop:
 __libc_malloc (bytes=96) at malloc.c:3615
 operator new(unsigned int) () from /usr/lib/i386-linux-gnu/libstdc++.so.6
 QMutex::QMutex (this=0xb0070a38, mode=QMutex::NonRecursive) at thread/qmutex.cpp:124
 QPostEventList (this=0xb0070a10, initialRefCount=1) at thread/qthread_p.h:110
 QThreadData::QThreadData (this=0xb0070a10, initialRefCount=1) at thread/qthread.cpp:81