404. That’s an error.

The requested URL /custom?q=%22CategoryKeys%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=AELymgUZSPJXg5UqGJ_oTKMhGEv8gLBSwhWNV7DqGfvnBc3UK3e_WOIcWibhXEsA-RDmnZdoMiyGx0AeshlbZC4219vqsnAYP1hrn1iPWI1hXyUzjYz3_0Q&hl=en&boostcse=0&ie=UTF-8&oe=UTF-8&prmd=ivns&ei=XmUXVtixK8GeNqCPuYAM&start=40&sa=N was not found on this server. That’s all we know.