You may have caught this during our transition of Speakeasy to the new forums platform.
Just an FYI the old forum Real Time Activity page will not include SE posts in them because SE is on the new platform now. The Real Time Activity for the new forums platform is almost complete. Once it is complete it will display any post, posted on the new platform.
I tried to read this post http://www.cnet.com/forums/discussions/google-whitehouse-and-n-word-search-641926/ from http://forums.cnet.com/realtime/?tag=blankArea.0
and got Sorry Dave 404