nm-connection-editor assert failure: ERROR:nm-connection-editor.c:207:connection_editor_validate: assertion failed: (s_con)

Error occurred after entering the authentication password while trying to modify a 3G connection in the network manager applet.

ProblemType: Crash
Architecture: i386
AssertionMessage: ERROR:nm-connection-editor.c:207:connection_editor_validate: assertion failed: (s_con)
CRDA: Error: [Errno 2] No such file or directory
CrashCounter: 1
Date: Thu Oct 8 11:05:11 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/nm-connection-editor
IfupdownConfig:
 auto lo
 iface lo inet loopback
IpRoute:
 192.168.10.0/24 dev eth0 proto kernel scope link src 192.168.10.249 metric 1
 169.254.0.0/16 dev eth0 scope link metric 1000
 default via 192.168.10.1 dev eth0 proto static
Package: network-manager-gnome 0.8~a~git.20091002t194214.8515a07-0ubuntu1
ProcCmdline: /usr/bin/nm-connection-editor
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-12.40-generic
Signal: 6
SourcePackage: network-manager-applet
StacktraceTop:
 __kernel_vsyscall ()
 raise () from /lib/tls/i686/cmov/libc.so.6
 abort () from /lib/tls/i686/cmov/libc.so.6
 g_assertion_message () from /lib/libglib-2.0.so.0
 g_assertion_message_expr () from /lib/libglib-2.0.so.0
Title: nm-connection-editor assert failure: ERROR:nm-connection-editor.c:207:connection_editor_validate: assertion failed: (s_con)
Uname: Linux 2.6.31-12-generic i686
UserGroups: adm admin audio cdrom dialout dip fax fuse lpadmin netdev plugdev sambashare tape video