crash problem

I'm using gtk+extra-2.1.1 with glade. I'm using the gtksheet widget in a
window. However, I'm getting the following crash when I select multiple
cells or a row. I didn't do anything special with the focus in/out events.
Does anyone have any ideas?

Thanks

Edward Wang

(optical_monitoring:8995): Gtk-WARNING **: GtkEntry - did not receive
focus-out-event. If you
connect a handler to this signal, it must return
FALSE so the entry gets the event as well

Gtk-ERROR **: file gtkentry.c: line 4856 (blink_cb): assertion failed:
(GTK_WIDGET_HAS_FOCUS (entry))
aborting...
Aborted