Description of problem:
after i run this command  "service NetworkManager restart" many times.

Version-Release number of selected component:
gnome-shell-3.4.1-6.fc17

Additional info:
backtrace_rating: 4
cmdline:        /usr/bin/gnome-shell
crash_function: atk_object_notify_state_change
executable:     /usr/bin/gnome-shell
kernel:         3.7.9-104.fc17.i686.PAE
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 atk_object_notify_state_change at atkobject.c:1173
 #1 notify_accessible_state_change at st/st-widget.c:2327
 #2 st_widget_remove_accessible_state at st/st-widget.c:2375
 #3 ffi_call_SYSV at ../src/x86/sysv.S:64
 #4 ffi_call at ../src/x86/ffi.c:303
 #5 gjs_invoke_c_function at gi/function.c:930
 #6 function_call at gi/function.c:1245
 #7 CallJSNative at jscntxtinlines.h:701
 #8 js::Invoke at jsinterp.cpp:696
 #9 js::Interpret at jsinterp.cpp:4810

Potential duplicate: bug 904696