Index: libxfce4util/xfce-rc-simple.c
===================================================================
--- libxfce4util/xfce-rc-simple.c	(revision 24693)
+++ libxfce4util/xfce-rc-simple.c	(working copy)
@@ -124,6 +124,36 @@ static gchar*   simple_escape     (gchar
 static gboolean simple_write      (XfceRcSimple *simple,
                         				   const gchar  *filename);
 
+#if GLIB_CHECK_VERSION(2, 10, 0)
+/*
+ * In glib >= 2.10.0, GMemChunk uses the g_slice allocator internally, and
+ * does not keep track of allocated memory segments.  Because of this,
+ * g_mem_chunk_destroy() does not free memory allocated by the chunk, which
+ * leaks like crazy.  Still use g_mem_chunk_free() here in the unlikely
+ * event that the bug in glib ever gets fixed; that way there won't be crashes
+ * due to double free()s.
+ */
+static void
+simple_free_all_groups(XfceRcSimple *simple)
+{
+  Group  *group;
+  Entry  *entry;
+  LEntry *lentry;
+
+  for (group = simple->gfirst; group; group = group->next)
+    {
+      for (entry = group->efirst; entry; entry = entry->next)
+        {
+          for (lentry = entry->lfirst; lentry; lentry = lentry->next)
+            {
+              g_mem_chunk_free (simple->lentry_chunk, lentry);
+            }
+          g_mem_chunk_free (simple->entry_chunk, entry);
+        }
+      g_mem_chunk_free (simple->group_chunk, group);
+    }
+}
+#endif
 
 static Group*
 simple_add_group (XfceRcSimple *simple, const gchar *name)
@@ -660,6 +690,10 @@ _xfce_rc_simple_close (XfceRc *rc)
 {
   XfceRcSimple *simple = XFCE_RC_SIMPLE (rc);
 
+#if GLIB_CHECK_VERSION(2, 10, 0)
+  simple_free_all_groups(simple);
+#endif
+
   if (!simple->shared_chunks)
     {
       g_mem_chunk_destroy (simple->entry_chunk);