404. That’s an error.

The requested URL /custom?q=%22CategoryCustomize%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=AELymgUIrG9_R6Eyu2k0zx1Of5qIJAJgIMuqjPxde7ROF9Zvuex6vkQYjkjdeYv5b3oHGLA5nCiwhsfI1X5tfI6ZLqO71YCJVUe6q3Gva-fdRZbm1WT2BrM&hl=en&boostcse=0&ie=UTF-8&oe=UTF-8&prmd=ivns&ei=rNFNV9nLHMbf-QGAtKG4CQ&start=10&sa=N was not found on this server. That’s all we know.