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Something really weird just happened in this question.

I answered the question and then clicked edit to add a few more details. Once I submitted the edit, a new answer was added instead of editing my original one. I deleted the original answer so only users with 10k+ rep can see it, but the bug is there.

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Did you check your browser history wether you ever went to so/posts/number/edit? –  balpha Aug 23 '09 at 20:04
    
There was a (actually two) similar ticket during the UserVoice era. I don't know how/if it was resolved. –  dmckee Aug 24 '09 at 4:28

3 Answers 3

Testing "back button" theory.

If you see this post it is because I just posted an answer (here) and hit the "back" button to edit it. This would create a second post (this one).


[original message]

Are you sure you did not hit the "back" button on your browser to get back to the editor?

That will cause a second answer to be posted as an apparent duplicate.

Someone please correct me if I am wrong.

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Are you sure you did not hit the "back" button on your browser to get back to the editor?

That will cause a second answer to be posted as an apparent duplicate.

Someone please correct me if I am wrong.

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That is an interesting theory, but I am sure I didn't do that. I hope not, anyways. :P –  Paolo Bergantino Aug 23 '09 at 19:11
    
I've done it. –  Robert Cartaino Aug 23 '09 at 19:13
    
I guess I did it. Otherwise it has happened to me. –  IAbstract May 9 '10 at 16:00

if the flow is this:

  1. add an answer

  2. realize you want to change your answer

  3. instead of clicking the edit menu item on your newly submitted answer, you press the back button in your browser

  4. "edit" your answer (note that you're not really editing, but adding another answer) and click submit

That would most certainly add a second answer, and it's also impossible for us to detect, as you are adding two different answers with the "edit".

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I checked, and I didn't do this. It happened by clicking edit and it created the new answer. I would obviously expect clicking back to add a new answer, but it's not what I did. –  Paolo Bergantino Aug 24 '09 at 0:11
    
I'm pretty sure I've never seen such a bug in my past ~1500 answers. I've edited many of them, many times. –  LeakyCode Aug 24 '09 at 0:41
1  
@Mehrdad: Not sure what that is supposed to mean. I've got ~1000 answers and I have certainly edited them many times. I'm not saying it's a critical bug but the behavior I am describing happened. –  Paolo Bergantino Aug 24 '09 at 10:44
    
@Paolo: I know; but are you 100% sure that you didn't do anything like the "back button theory" or similar stuff? If it was a reproducible bug, it should have happened to more people by now. –  LeakyCode Aug 24 '09 at 17:01
    
actually it's very easy to detect. Just put some hidden value in the <form> and bind it to the post when it's posted; when the form is submitted check if that value has already been bound to another post. –  Andreas Bonini May 9 '10 at 18:25

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