[NKosmatos]

Thanks for providing the search functionality. I always use it before submitting something, in case someone else has already posted it recently.

@dang It would be great if this duplicate search functionality was embedded in the HN submission form ;-)

[lolinder]

It actually is, for exact URL matches: if you try to submit a URL that has a recent exact match, it will just redirect you to that submission instead of creating a new one.

[nubinetwork]

Except when it doesn't and people submit the same link several times a week

[ehsankia]

Does it do any URL cleaning, removing fragments, maybe normalizing shortlinks?

[lolinder]

No idea, I haven't ever intentionally tried to break it, I've just noticed it redirect me sometimes. I always clean my own links before attempting to submit.