[jamesbritt]

Dupe-catcher seems to treat fragment IDs as defining a unique URL:

http://news.ycombinator.com/item?id=3667166

http://news.ycombinator.com/item?id=3685113

In fact, out of curiosity I tried to submit the story once again by munging the fragment ID. And was able to:

http://news.ycombinator.com/item?id=3687267