404. That’s an error.

The requested URL /custom?q=%22CategoryChatClient%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=AELymgVGfrqmw0OTv2KQzOEGQmXVO7LD7rwnab8Io80ek700g6HpypmCmBk2yM3A-tdXL2G0849ae0B5DG8PME5GTk4VUHy0PNZy4vZb6c6wtyOsd9N8aE4&hl=en&boostcse=0&ie=UTF-8&oe=UTF-8&prmd=ivns&ei=slReVp2pIMLLetOSpZgE&start=30&sa=N was not found on this server. That’s all we know.