Bing search results showing up in Google
robots.txt applies to the source of the links, not the target.<p>So if, say, <a href="http://www.paulgraham.com/" rel="nofollow">http://www.paulgraham.com/</a> links to <a href="http://m.bing.com/search" rel="nofollow">http://m.bing.com/search</a>, then <a href="http://m.bing.com/robots.txt" rel="nofollow">http://m.bing.com/robots.txt</a> does not apply to that.<p>EDIT: If you think this is wrong, please explain it instead of just downvoting me, because I think it is pretty unfair that I lose karma for explaining my interpretation.