Gtk+ memory freeing

[Mario Motta <mmotta guest net>]

hi to all gtk+ gurus,
i'm trying to understand how Gtk+ manages memory freeing.
Since neither examples nor tutorial mention this argument i assume that
after a gtk_somewidget_new(), gtk+ takes care internally of all memory
freeing stuff.
However some reports have been made about memory leaks, so there is
someone that can explain wich is the correct way to assure memory
freeing in Gtk+ or alternatively points me to right docs ?
Thanks in advance.
-- 
Mario Motta
mmotta@guest.net
http://www.guest.net/homepages/mmotta/index.htm