Gtk::ComboBoxEntryText : selection of the same item is not recognized

[Sai <rsaikamesh gmail com>]

HI

I Have added a Gtk::ComboBoxEntryText on a Gtk::Window. When
ever an item is selected from the ComboBoxEntryText, the
ComboBoxEntryText needs to be removed from the Window and a Gtk::Label
has to be added in the place of ComboBoxEntryText. This works fine if a
different item is selected in the combo box every time. Because I have
added signal_changed() signal to the ComboBoxEntryText. 

But when I
select the SAME ITEM from the ComboBoxEntryText which is selected
already, this signal handler does not get called ( because the name of
that signal itself clearly says that it will get called only when the
selection is changed ). Please give me some ideas on how to capture
this event. note: my OS is linux (ubuntu 6.10)

Thanks in Advance!