Release Notes: The treeview-refactor branch was merged, bringing more flexible cell arrangement with GtkCellArea, GtkCellAreaBox, and others. The gdk-backend branch was merged, cleaning up the internal frontend/backend separation in GDK. Backends other than X11 are broken in this release. Many functions were deprecated and removed. The GDK X11 backend now uses XI2 (including multi-device capabilities) by default. Other enhancements were made and many minor bugs were fixed.
Release Notes: Unnecessary exposes and redraws are now avoided with client side windows. An "action area" was added to GtkNotebook. A "message area" was added to GtkStatusbar. GtkToolPalette was introduced as a container of collapsible groups. gdk-pixbuf can now handle compressed TIFF images. Many bugs were fixed.