404. That’s an error.

The requested URL /custom?q=%22CategorySpelling%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=AELymgWFP0jypOufOQHk7tvCdUDEmBj6XCOAsu1FnINutC6se77eNuq74sSl1NW0ho_j2V1oLgNGJmzsExzDOi9KSamBxvd7Z0d_IfnlGl9z9E5gWAr7TyE&hl=en&boostcse=0&ie=UTF-8&oe=UTF-8&prmd=ivns&ei=p4C2VpHzF8fPeo3pijA&start=10&sa=N was not found on this server. That’s all we know.