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Dupe detection just isn't what it used to be, this is from today as well: http://news.ycombinator.com/item?id=1444641

(The URLs of each entry look the same to me, is exact dupe detection broken? Perhaps this URL was edited post-submission and is now equal?)

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And why would I edit the URL?

I've edited mine before if I notice there is cruft like campaign trackers, etc., to get to the canonical URL (i.e., I made a mistake submitting). I am not "accusing" you of anything, I am wondering why the dupe detector does not work. It's of interest to me especially since I rely on the submission here to do an atomic "Submit or vote this up" action instead of polluting things.

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