2.4.2:

Gtk:
* ComboBox::get_active(): Properly initialize the iterator. 
  (Murray Cumming)
* ComboBoxTextEntry: Don't add the text column twice. (Teemu Tervo)
* ComboBoxText, ComboBoxEntryText::get_active_text(): Fix potential 
  crash. (Murray Cumming)
* TreeView::get_path_at_pos(): Correct memory mangement.
  (Murray Cumming, David)
* Use GTHREAD_CFLAGS when appropriate. (Daniel Elstner)
* gtkmm.h: Add comboboxentry.h and comboboxentrytext.h.
  (Daniel Elstner)

Reference Documentation:
* FileChooser: Mention the need to convert to UTF8. (Daniel Elstner)