Index: gtk2drawing.c
===================================================================
RCS file: /cvsroot/mozilla/gfx/src/gtk/Attic/gtk2drawing.c,v
retrieving revision 1.15.8.2.4.1
diff -d -u -p -U 10 -r1.15.8.2.4.1 gtk2drawing.c
--- gtk2drawing.c	29 Sep 2007 06:50:46 -0000	1.15.8.2.4.1
+++ gtk2drawing.c	10 Apr 2008 03:05:59 -0000
@@ -1083,26 +1083,30 @@ static gint
 moz_gtk_tooltip_paint(GdkDrawable* drawable, GdkRectangle* rect,
                       GdkRectangle* cliprect)
 {
     GtkStyle* style;
 
     ensure_tooltip_widget();
     style = gtk_rc_get_style_by_paths(gtk_settings_get_default(),
                                       "gtk-tooltips", "GtkWindow",
                                       GTK_TYPE_WINDOW);
 
+    g_object_ref(style);
     gtk_style_attach(style, gTooltipWidget->window);
     TSOffsetStyleGCs(style, rect->x, rect->y);
     gtk_paint_flat_box(style, drawable, GTK_STATE_NORMAL, GTK_SHADOW_OUT,
                        cliprect, gTooltipWidget, "tooltip",
                        rect->x, rect->y, rect->width, rect->height);
 
+    gtk_style_detach(style);
+    g_object_unref(style);
+
     return MOZ_GTK_SUCCESS;
 }
 
 static gint
 moz_gtk_frame_paint(GdkDrawable* drawable, GdkRectangle* rect,
                     GdkRectangle* cliprect)
 {
     GtkStyle* style = gProtoWindow->style;
 
     TSOffsetStyleGCs(style, rect->x, rect->y);