nm-connection-editor unable to create system connection, returning "The connection could not be added due to an unknown error."

[Rodney Morris <rodamorris gmail com>]

When using nm-connection-editor to add a system connection, nm-connection-editor fails create the system connections,  responding that "The connection could not be added due to an unknown error."  I am using F10 x86_64 and NetworkManager-0.7.1-1.fc10.x86_64.

When run from a terminal window, nm-connection-editor outputs the following to the terminal when adding a system connection:

(nm-connection-editor:3174): GLib-GObject-WARNING **: instance of invalid non-instantiatable type `(null)'                                                      

(nm-connection-editor:3174): GLib-GObject-CRITICAL **: g_signal_handlers_unblock_matched: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed                   

** (nm-connection-editor:3174): CRITICAL **: nm_connection_editor_get_window: assertion `NM_IS_CONNECTION_EDITOR (editor)' failed

Below is my nm-system-settings.conf:

[main]
plugins=ifcfg-rh, keyfile

The "system-connections" directory exists in /etc/NetworkManager.  The log files contain nothing from this error.

Has anyone encountered this error?  Any thoughts on what I am doing wrong?

Thanks in advance for any help in resolving this mystery,

Rod