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I was just browsing some of my top answers on SO. I visited my answer, edited the question (there was a typo), and my answer to that question got upvoted in 5 seconds. The question(and my answer) are at least 2 weeks old and not that popular (~500 views).

So is that a coincidence? Or editing a post may have triggered an event which might have attracted someone's attention to the post? I am inclined to reject the idea that the question poster voted me up because he was last seen 2 hours ago...

This example is vivid, but I sometimes get the impression that it is common do get an upvote to an old question or answer which you've recently visited/edited.

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up vote 13 down vote accepted

Editing posts can bring them up on the front page. Someone browsing at that time could have seen that question and liked your answer.

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Can bring them or does bring them? – Armen Tsirunyan Jul 17 '11 at 15:10
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It will bring them to the default front page, which is sorted by the latest activity - and editing is considered activity same way as adding answer, setting bounty or accepting an answer. – Shadow Wizard Jul 17 '11 at 15:12
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@Armen: Given the outwardly nondeterministic manner in which everyone's individual "front page" is generated, "can" is as good as it gets. – Nicholas Knight Jul 17 '11 at 15:12
    
It's complex (i.e. not just based on recent activity), but essentially yes. It does. – Lightness Races in Orbit Jul 17 '11 at 15:21
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It definitely does bump them. That doesn't guarantee that they'll appear on your front page, but if someone monitors the [c++] tag and you edit a post on a question with that tag, it's quite likely that they'll see it on their homepage. This is by far the most likely scenario; there's no bug in the system that allows you to upvote your own answer by editing it. – Cody Gray Jul 17 '11 at 15:31
    
@Cody: I never thought I upvoted it :) – Armen Tsirunyan Jul 17 '11 at 16:09

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