"GLib-1.3.4 has been released. This is a preview release of the
unstable branch of GLib and is meant for:
Those interested in the development of GLib or GTK+.
People planning to port to the upcoming GTK+-2.0 version of
GTK+. Note: this is a tentative API-freeze release, major API
changes beyond the remaining open '2.0 API freeze' bugs in bugzilla
are unlikely to occur before GLib-2.0 is released."
"If you install this version, do NOT replace your current GLib
with it. You should be able to install it alongside your current
GLib without disturbing your current GLib installation."
LinuxProgramming has download links and change info.