3 replaced http://meta.stackoverflow.com/ with https://meta.stackoverflow.com/
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Some time in mid or late 2011, a change was made that affected this behavior. Current names are now shown on some old posts, such as the one I used as the example in the question. However, old names are still present in some places, which can be seen in the user card column of these search resultsthese search results (thanks Tim Stone!).

Some time in mid or late 2011, a change was made that affected this behavior. Current names are now shown on some old posts, such as the one I used as the example in the question. However, old names are still present in some places, which can be seen in the user card column of these search results (thanks Tim Stone!).

Some time in mid or late 2011, a change was made that affected this behavior. Current names are now shown on some old posts, such as the one I used as the example in the question. However, old names are still present in some places, which can be seen in the user card column of these search results (thanks Tim Stone!).

2 original answer was not quite accurate
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Some time in mid or late 2011, a change was made that eliminatedaffected this behavior. Current names are now shown on some old posts, such as the one I used as the example in the question. However, old names are still present in some places, which can be seen in the user card column of these search results (thanks Tim Stone!).

Some time in mid or late 2011, a change was made that eliminated this behavior. Current names are now shown on old posts.

Some time in mid or late 2011, a change was made that affected this behavior. Current names are now shown on some old posts, such as the one I used as the example in the question. However, old names are still present in some places, which can be seen in the user card column of these search results (thanks Tim Stone!).

1
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Some time in mid or late 2011, a change was made that eliminated this behavior. Current names are now shown on old posts.