--- gnome-desktop3-3.2.1/libgnome-desktop/gnome-bg.c	2011-03-22 14:30:46.000000000 +0000
+++ gnome-desktop3-3.2.1-new/libgnome-desktop/gnome-bg.c	2012-01-19 15:26:15.196577707 +0000
@@ -112,6 +112,7 @@
 	time_t			file_mtime;
 	GdkPixbuf *		pixbuf_cache;
 	int			timeout_id;
+	gboolean hit_cache;
 
 	GList *		        file_cache;
 };
@@ -869,6 +870,39 @@
 }
 
 static void
+pixbuf_grid (GdkPixbuf **pixbuf)
+{
+	cairo_surface_t *grid_surface;
+	cairo_pattern_t *grid_pat;
+	int src_width = gdk_pixbuf_get_width (*pixbuf);
+	int src_height = gdk_pixbuf_get_height (*pixbuf);
+
+	cairo_surface_t* surface;
+	cairo_t *cr_surface;
+
+	surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, src_width, src_height);
+	cr_surface = cairo_create (surface);
+
+	/* Get a cairo pattern with the pixbuf, to manipulate. */
+	gdk_cairo_set_source_pixbuf (cr_surface, *pixbuf, 0, 0);
+	cairo_paint (cr_surface);
+
+	grid_surface = cairo_image_surface_create_from_png ("/usr/share/backgrounds/desktop_grid.png");
+
+	grid_pat = cairo_pattern_create_for_surface (grid_surface);
+	cairo_pattern_set_extend (grid_pat, CAIRO_EXTEND_REPEAT);
+	cairo_set_source (cr_surface, grid_pat);
+	cairo_set_operator (cr_surface, CAIRO_OPERATOR_OVERLAY);
+	cairo_paint (cr_surface);
+
+	cairo_surface_t* target = cairo_get_target (cr_surface);
+
+	g_object_unref (*pixbuf);
+
+	*pixbuf = gdk_pixbuf_get_from_surface (target, 0, 0, src_width, src_height);
+}
+
+static void
 draw_image_area (GnomeBG         *bg,
 		 gint             num_monitor,
 		 GdkPixbuf       *pixbuf,
@@ -885,6 +919,9 @@
 
 	scaled = get_scaled_pixbuf (bg->placement, pixbuf, dest_width, dest_height, &x, &y, &w, &h);
 
+	if (!bg->hit_cache)
+		pixbuf_grid (&scaled);
+
 	switch (bg->placement) {
 	case G_DESKTOP_BACKGROUND_STYLE_WALLPAPER:
 		pixbuf_tile (scaled, dest);
@@ -1818,7 +1855,11 @@
 			else
 				pixbuf = gdk_pixbuf_new_from_file (filename, NULL);
 			g_free (tmp);
+
+			bg->hit_cache = FALSE;
 		}
+		else
+			bg->hit_cache = TRUE;
 
 		if (pixbuf)
 			file_cache_add_pixbuf (bg, filename, pixbuf);
@@ -2204,6 +2245,8 @@
 			g_object_unref (bg->pixbuf_cache);
 			bg->pixbuf_cache = NULL;
 		}
+		else
+			bg->hit_cache = TRUE;
 	}
 
 	if (!hit_cache && bg->filename) {