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How does the original author of a question get to create a duplicate title but an editor of the question (who didn't even change the title) gets told that it can't be edited because a question of that title already exists? The question under debate is now called Segmentation Fault (core dumped)...BMH Algorithm, where I added the 'BMH Algorithm' to get past the uniqueness filter. (Don't get me wrong; the title wasn't great — but it was acceptable when the question was asked, so why wasn't acceptable when the question was edited?)

There's a question about this from January 2012 with 'status-completed'. If it was fixed back then, it is now unfixed again.

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If it's an old question, it could have occurred before that restriction was put into place. It didn't always exist. –  animuson Mar 7 '13 at 6:22
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@animuson: The question (which I've now identified) was under an hour old when I tried to edit its body ... I doubt if that's the reason. –  Jonathan Leffler Mar 7 '13 at 6:24
    
Hmm, that looks like it might have something to do with periods at the end... The other question doesn't have them. –  animuson Mar 7 '13 at 6:25
    
It's quite possible punctuation like that is ignored to prevent people just adding periods to create uniqueness. But only when someone edits? Sounds fishy to me. –  J. Steen Mar 7 '13 at 7:01
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