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The question How to tab between buttons on an Mac OS X dialog box, recently migrated from SO to SU, has the interesting sight of two accepted answers. Even if this is a case of a merge (which is not documented on the page), surely the checkmark should only be shown for the answer accepted by this question's author.

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  • That's funny :) Commented Sep 14, 2012 at 1:45
  • This kind of issue was reported here on meta before too,Two accepted answers?
    – Lucifer
    Commented Sep 14, 2012 at 2:02
  • @Lucifer looks like it must be different causes since this happens after a refresh
    – Zelda
    Commented Sep 14, 2012 at 2:31
  • @BenBrocka, but both the sites are different. The case has not repeated to S.O. but this is first time for Superuser site.
    – Lucifer
    Commented Sep 14, 2012 at 2:36
  • This is not the first time it's happened on SU @luc
    – random
    Commented Sep 14, 2012 at 3:28
  • I think this may be the highest upvote rate of any of my posts...
    – Kevin Reid
    Commented Sep 14, 2012 at 3:42
  • Interesting case; the tooltips on the two checkmarks differ (the second one adds a date). Commented Sep 14, 2012 at 10:38

2 Answers 2

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Some ancient bug in migrations (I think we're on revision 8 on that) smashed that particular post, I've fixed up the data.

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  • And now the wrong one is pinned to the top. :)
    – Mysticial
    Commented Oct 3, 2012 at 21:09
  • @Mysticial it'll fix itself in a minute. Commented Oct 3, 2012 at 21:11
  • Looks like it's already fixed. :)
    – Mysticial
    Commented Oct 3, 2012 at 21:12
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I suspect this is an ancient bug (and probably long-ago fixed so new posts can't cause this anymore), but it's bizarre

The SO question was one of the first posts, and the timeline shows that it's always had two accepted answers, with no unaccept. The first one is the one recorded in the data dump as the actual accepted answer. The SU migration automatically unaccepted the second one, but both posts are still showing up with checkmarks, and the supposed unaccepted one is the one getting credit (this versus this)

The way the database schema is set up, only one post can actually be accepted, so the double checkmark has to be generated some other way. It looks like https://superuser.com/a/473144/36115 is the one that's actually accepted

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