Description of problem:
I was configuring a VPN connection, while on the other hand I turned off the proxy

Version-Release number of selected component:
nm-connection-editor-0.9.7.0-6.git20121211.fc18

Additional info:
backtrace_rating: 4
cmdline:        nm-connection-editor --create --type vpn
crash_function: _gtk_rbtree_insert_after
executable:     /usr/bin/nm-connection-editor
kernel:         3.7.2-201.fc18.x86_64
uid:            1000
var_log_messages: Jan 21 16:05:48 localhost abrt[29551]: Saved core dump of pid 29513 (/usr/bin/nm-connection-editor) to /var/spool/abrt/ccpp-2013-01-21-16:05:48-29513 (71028736 bytes)

Truncated backtrace:
Thread no. 1 (10 frames)
 #4 _gtk_rbtree_insert_after at gtkrbtree.c:465
 #5 gtk_tree_view_row_inserted at gtktreeview.c:8868
 #10 gtk_tree_model_row_inserted at gtktreemodel.c:1820
 #11 emit_row_inserted_for_node at gtkfilesystemmodel.c:309
 #12 node_set_visible_and_filtered_out at gtkfilesystemmodel.c:359
 #13 node_compute_visibility_and_filters at gtkfilesystemmodel.c:481
 #14 add_file at gtkfilesystemmodel.c:1867
 #15 _gtk_file_system_model_update_file at gtkfilesystemmodel.c:1941
 #16 gtk_file_system_model_query_done at gtkfilesystemmodel.c:1226
 #17 g_simple_async_result_complete at gsimpleasyncresult.c:775