Index: gnome-settings-daemon/plugins/clipboard/gsd-clipboard-manager.c
===================================================================
--- gnome-settings-daemon.orig/plugins/clipboard/gsd-clipboard-manager.c	2010-09-01 17:52:46.034732000 +0200
+++ gnome-settings-daemon/plugins/clipboard/gsd-clipboard-manager.c	2010-09-01 18:04:53.164732000 +0200
@@ -623,6 +623,13 @@
                 conversions = list_prepend (conversions, rdata);
         }
 
+        if (conversions == NULL) {
+                g_critical ("conversions == NULL");       
+                if (multiple)
+                        free (multiple);
+                return;
+        }
+
         list_foreach (conversions, (Callback) convert_clipboard_target, manager);
 
         if (conversions->next == NULL &&
