- Tool tips can be placed on Widget and tree view
- You can build your interface via changing XML discreption.
- New widget and object,such as GtkVolumeButton,GtkScaleButton,GtkRecentAction and so on.
- newFile Selector,surpporting search,display recent files.
- improved test view and item widget
- improved gdk-pixbuf
Pls see more from here:http://www.gtk.org/gtk-2.12-notes.html