404. That’s an error.

The requested URL /custom?q=%22CategoryDirectories%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=AELymgXsJDFyigYb7wu5b_nsgsYTNLAhdjChcRCkh_TFqGQbvSMuNxymFUcZV8wPU2aDxwc_5ripdE3Eb93pQWgcj9fAz6LLpxeJOHMTd-bP0Y4AI4PcNTw&hl=en&boostcse=0&ie=UTF-8&oe=UTF-8&prmd=ivns&ei=HNoWVqzJDYe3-AHYx7yIDA&start=20&sa=N was not found on this server. That’s all we know.