[apport] gnome-theme-manager crashed with SIGSEGV in strrchr()"

when i deleted icons package from theme option in gnome control center

ProblemType: Crash
Date: Thu Feb 22 18:36:27 2007
DistroRelease: Ubuntu 7.04
ExecutablePath: /usr/bin/gnome-theme-manager
Package: gnome-control-center 1:2.17.91-0ubuntu4
ProcCmdline: gnome-theme-manager
ProcCwd: /home/jaffar
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/bin/X11:/usr/games
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: control-center
StacktraceTop:
 strrchr () from /lib/tls/i686/cmov/libc.so.6
 g_path_get_dirname () from /usr/lib/libglib-2.0.so.0
 gnome_theme_details_reread_themes_from_disk ()
 ?? ()
 ?? ()
Uname: Linux jaffar-desktop 2.6.20-8-generic #2 SMP Tue Feb 13 05:18:42 UTC 2007 i686 GNU/Linux
UserGroups: adm admin audio cdrom dialout dip fax floppy plugdev scanner tape