nspluginviewer crashed with SIGSEGV in QCoreApplication::postEvent()

Binary package hint: kdebase

after trying to play some mp3 file from krusader in view mode (F3) it crashed

ProblemType: Crash
Architecture: i386
Date: Wed Oct 7 20:52:17 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/nspluginviewer
Package: konqueror-nsplugins 4:4.3.2-0ubuntu1
ProcCmdline: /usr/bin/nspluginviewer -dbusservice org.kde.nspluginviewer-10787
ProcEnviron:
 LANG=pl_PL.UTF-8
 SHELL=/bin/bash
 LANGUAGE=
ProcVersionSignature: Ubuntu 2.6.31-12.40-generic
SegvAnalysis:
 Segfault happened at: 0x8874312 <_ZN16QCoreApplication9postEventEP7QObjectP6QEventi+34>: mov 0x4(%ecx),%eax
 PC (0x08874312) ok
 source "0x4(%ecx)" (0x00000005) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: kdebase
StacktraceTop:
 QCoreApplication::postEvent(QObject*, QEvent*, int) ()
 QCoreApplication::postEvent(QObject*, QEvent*) ()
 QObject::deleteLater() () from /usr/lib/libQtCore.so.4
 ?? ()
 ?? ()
Title: nspluginviewer crashed with SIGSEGV in QCoreApplication::postEvent()
Uname: Linux 2.6.31-12-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare