nepomukservicestub crashed with SIGSEGV in librdf_world_open()

[Malware]

Binary package hint: kdebase-runtime

Problem occurs under Gnome????

I didnt manage to find what triggers it.

ProblemType: Crash
Architecture: amd64
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/nepomukservicestub
NonfreeKernelModules: nvidia
Package: kdebase-runtime 4:4.2.0-0ubuntu1
ProcCmdline: /usr/bin/nepomukservicestub nepomukstorage
ProcCwd: /home/swiegand/Dokumente
ProcEnviron:
 LANGUAGE=de_DE:de:en_GB:en
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: kdebase-runtime
StacktraceTop:
 librdf_world_open () from /usr/lib/librdf.so.0
 librdf_new_hash_datum () from /usr/lib/librdf.so.0
 librdf_hash_get_one () from /usr/lib/librdf.so.0
 librdf_new_uri () from /usr/lib/librdf.so.0
 raptor_namespaces_init ()
Title: nepomukservicestub crashed with SIGSEGV in librdf_world_open()
Uname: Linux 2.6.28-8-generic x86_64
UserGroups: adm admin audio cdrom dialout dip floppy fuse lpadmin plugdev sambashare vboxusers video