See the file 'INSTALL'
+Notes about GLib 2.20
+=====================
+
+^ The functions for launching applications (e.g. g_app_info_launch() +
+ friends) now passes a FUSE file:// URI if possible (requires gvfs
+ with the FUSE daemon to be running and operational). With gvfs 2.26,
+ FUSE file:// URIs will be mapped back to gio URIs in the GFile
+ constructors. The intent of this change is to better integrate
+ POSIX-only applications, see bug #528670 for the rationale. The
+ only user-visible change is when an application needs to examine an
+ URI passed to it (e.g. as a positional parameter). Instead of
+ looking at the given URI, the application will now need to look at
+ the result of g_file_get_uri() after having constructed a GFile
+ object with the given URI.
+
Notes about GLib 2.18
=====================