Comment 2 for bug 915015

StacktraceTop:
 g_return_if_fail_warning (log_domain=0xb710b66e "GLib", pretty_function=0xb710f820 "g_hash_table_foreach", expression=0xb710f574 "version == hash_table->version") at /build/buildd/glib2.0-2.31.8/./glib/gmessages.c:801
 g_hash_table_foreach (hash_table=0x993c808, func=0x8108e50 <disconnect_entry_foreach>, user_data=0x0) at /build/buildd/glib2.0-2.31.8/./glib/ghash.c:1510
 gabble_vcard_manager_dispose (object=0x99318c8) at vcard-manager.c:590
 g_object_unref (_object=0x99318c8) at /build/buildd/glib2.0-2.31.8/./gobject/gobject.c:2971
 gabble_connection_dispose (object=0x9924440) at connection.c:1211