nepomukservicestub crashed with SIGSEGV in _IO_sgetn()

Binary package hint: kdebase-runtime

i got this error message while trying to open a mht file with kmail

ProblemType: Crash
Architecture: i386
Date: Sat Feb 20 05:41:27 2010
DistroRelease: Ubuntu 10.04
ExecutablePath: /usr/bin/nepomukservicestub
Package: kdebase-runtime 4:4.4.0-0ubuntu3
ProcCmdline: /usr/bin/nepomukservicestub nepomukstrigiservice
ProcEnviron:
 LANGUAGE=en_IN.utf8
 LANG=en_IN.utf8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-13.18-generic
SegvAnalysis:
 Segfault happened at: 0x3e3a9c: rep movsl %ds:(%esi),%es:(%edi)
 PC (0x003e3a9c) ok
 source "%ds:(%esi)" (0xb55ff47b) ok
 destination "%es:(%edi)" (0x0000047b) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: kdebase-runtime
StacktraceTop:
 ?? () from /lib/tls/i686/cmov/libc.so.6
 ?? () from /lib/tls/i686/cmov/libc.so.6
 _IO_sgetn () from /lib/tls/i686/cmov/libc.so.6
 fread () from /lib/tls/i686/cmov/libc.so.6
 Strigi::FileInputStream::fillBuffer(char*, int) ()
Title: nepomukservicestub crashed with SIGSEGV in _IO_sgetn()
Uname: Linux 2.6.32-13-generic i686
UserGroups: adm admin audio cdrom dialout dip fuse lpadmin netdev plugdev sambashare scanner tape video