Menus use the GtkUIManager to
          generate menu structure dynamically from XML data files.
        
A completely revamped File Chooser is used everywhere in the GIMP for opening or saving files. The best thing about it is that it lets you create a set of “bookmarks”, making it possible to navigate quickly and easily to commonly used directories.
GIMP now supports fancy ARGB cursors when they are available on the system.