404. That’s an error.

The requested URL /custom?q=%22CategoryHypermedia%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=AELymgWde8PvKn6YgTBsYNZqROOcGSk64E3z9ekeDMTh9NftSbtDwYOel9g8AzEar1VDZwTbbc2TYJfZuRC1mEg6Bjzxu2a3ICW3dnjkocYgjk59L9Jek1o&hl=en&boostcse=0&ie=UTF-8&oe=UTF-8&prmd=ivns&ei=lW9ZVpv8IoGre_7zlogL&start=20&sa=N was not found on this server. That’s all we know.