http://example.com/story/ http://example.com/story/ http://example.com/story/?s=hn HN will identify the second URL as a duplicate of the first URL. However

http://example.com/story/ http://example.com/story/ http://example.com/story/?s=hn HN will identify the second URL as a duplicate of the first URL. However it will allow the third URL through. In a perfect world HN would check if the submissions provided a canonical url and use the canonical url for deduplication. I have seen an increasing number of people using the $x=yz trick to get past the duplicate detector lately. For instance: http://www.restorethefourth.net/?s=hn thepumpkin1979 15 days ago 350+ points http://www.restorethefourth.net/ 15 days ago iProject 2 points NB: This is merely an example. I do not mean to single thepumpkin1979 out. That is just the first username that I could recall that has multiple ?s=hn in their 30 most recent submissions.