404. That’s an error.
The requested URL /custom?q=%22window%22&client=google-coop-np&cof=FORID:13%3BAH:left%3BS:http://www.emacswiki.org/%3BCX:Emacs%2520Wiki%2520Search%3BL:http://www.emacswiki.org/emacs_rss.png%3BLH:43%3BLP:1%3BVLC:%23551a8b%3BDIV:%23cccccc%3B&cx=004774160799092323420:6-ff2s0o6yi&adkw=AELymgVOeRT4VjRtxQNtKas_8yeV1ykifGyJlvsp_jSoLl40QYZpTHqTHPl8k74jBHafyZRoxATQ_luFFu3wH65W_M07cJT9-RXOgz8I69jFlX6CjrdkxoY&hl=en&boostcse=0&ie=UTF-8&oe=UTF-8&prmd=ivnsp&ei=_BstV6SuG-SSgAb9qqGICQ&start=20&sa=N
was not found on this server. That’s all we know.