See the file 'INSTALL'
+Notes about GLib 2.28
+=====================
+
+* The GApplication API has changed compared to the version that was
+ included in the 2.25 development snapshots. Existing users will need
+ adjustments.
+
+Notes about GLib 2.26
+=====================
+
+* Nothing noteworthy.
+
Notes about GLib 2.24
=====================