404. That’s an error.

The requested URL /custom?q=%22CategoryAccessibility%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=AELymgVQHIph1EggHcwbSa10-1l6biCU3-u68jQtzKoF4IIGIWLxrDvLaELCFT7HeNsKQOzPaiaIchX9uvI0rtMPXITqeCSnnym3_y_05LpqKoOXXqhUt04&hl=en&boostcse=0&ie=UTF-8&oe=UTF-8&prmd=ivns&ei=4IAoV_anD8vPepycjfgO&start=10&sa=N was not found on this server. That’s all we know.