Description of problem:
I changed IPv4-Settings in NetworkManager.  auto --> manual and added IP-address, subnet and gateway. After entering gateway NM-Settings crashed and this came up in abrt.

Version-Release number of selected component:
control-center-3.9.91-1.fc20

Additional info:
reporter:       libreport-2.1.7
backtrace_rating: 4
cmdline:        gnome-control-center network
crash_function: gtk_list_box_real_focus
executable:     /usr/bin/gnome-control-center
kernel:         3.11.1-300.fc20.x86_64
runlevel:       unknown
type:           CCpp
uid:            1000
var_log_messages: Sep 18 14:53:05 p170hm abrt[3199]: Saved core dump of pid 3078 (/usr/bin/gnome-control-center) to /var/tmp/abrt/ccpp-2013-09-18-14:53:05-3078 (102711296 bytes)

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 gtk_list_box_real_focus at gtklistbox.c:1346
 #1 _gtk_marshal_BOOLEAN__ENUM at gtkmarshalers.c:269
 #6 gtk_widget_child_focus at gtkwidget.c:10152
 #7 gtk_container_focus at gtkcontainer.c:2975
 #8 _gtk_marshal_BOOLEAN__ENUM at gtkmarshalers.c:269
 #13 gtk_widget_child_focus at gtkwidget.c:10152
 #14 gtk_container_focus at gtkcontainer.c:2975
 #15 _gtk_marshal_BOOLEAN__ENUM at gtkmarshalers.c:269
 #20 gtk_widget_child_focus at gtkwidget.c:10152
 #21 gtk_container_focus at gtkcontainer.c:2975