...HACK... nodes visible), bug 3290 (changing directory or
	refreshing causes Gdk to assert), bug 2420 (Need to free original
	key when removing model node), and other assorted problems.

	* components/tree/nautilus-tree-view.c: (insert_hack_node),
	(remove_hack_node), (nautilus_tree_view_insert_model_node):
	Fix problem where the hash table key was neither g_strdup'd on the
	way in, nor g_free'd on the way out. This caused all the problems
	with bad nesting in the tree view.

	* nautilus-installer/src/installer.c: (create_pixmap):
	* src/file-manager/fm-list-view.c: (install_row_images):
	* src/nautilus-theme-selector.c: (add_theme):
	Added more checks for NULL before calling gdk_bitmap_unref.

	* src/file-manager/fm-directory-view.c: (no_items_showing):
	Fixed a NautilusDirectory ref. count leak.

	* libnautilus-extensions/nautilus-font-factory.c:
	(unref_global_font_factory), (nautilus_get_current_font_factory):
	Unref the font factory o...