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Yesterday, I saw this question pop up on Stack Overflow. At the time, the question's title was something about "zero-width lookahead not working".

An hour later, it had a new title. The question's history doesn't reveal any edits to that effect. At first I thought the question was deleted and then re-posted with a new title. So I searched my browser's history, found the original question and made sure it had the same ID.

Is there a way to hide edits from others? Is this a bug?

(Yes, I am 100% sure that the question initially had a different title and no, I cannot provide any screenshots with freehand cirlces.)

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    Perhaps the title was altered by the OP, within 5 minutes of posting?
    – Stephan202
    Commented Nov 9, 2009 at 9:31

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It's very possible that you spotted the original title before it was reworded within the 5 minute rule for edits.

If that was the case, you wouldn't have been able to see any difference in the edit if made inside the window of dressing time.

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    Aha! Didn't know about that. You get the check mark because you were 5 seconds faster than Chris.
    – innaM
    Commented Nov 9, 2009 at 9:43
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This is probably a duplicate but I'll answer it anyway.

The reason is that there is a 5 minute window for edits. All edits made within 5 minutes of the first are counted as one. This allows for questions and answers to be revised without pushing the post over the community wiki threshold.

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