nepomukservicestub crashed with SIGSEGV in librdf_free_hash_datum()

[Marco Cuomo]

it seems to be a background job. It suddenly popped up

ProblemType: Crash
Architecture: amd64
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/nepomukservicestub
NonfreeKernelModules: nvidia
Package: kdebase-runtime 4:4.2.0-0ubuntu1 [modified: usr/lib/kde4/libexec/kdesu]
ProcCmdline: /usr/bin/nepomukservicestub nepomukstorage
ProcEnviron:
 LANG=de_CH.UTF-8
 SHELL=/bin/bash
 LANGUAGE=
Signal: 11
SourcePackage: kdebase-runtime
StacktraceTop:
 librdf_free_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 ()
 raptor_new_namespaces ()
Title: nepomukservicestub crashed with SIGSEGV in librdf_free_hash_datum()
Uname: Linux 2.6.28-8-generic x86_64
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare