I am allowed to change my vote on some question or answer when it is edited. Apparently, this allowance does not extend to a change of the Community Wiki state.
Case in question: Someone asked a question which would have been good as a CW, but bad as a non-CW question. It wasn't a CW, so I voted it down. People explained the CW thing to the questioner and she or he edited the question checking the CW checkbox.
You have to click on "edit" to do this and then click the "Save Edits" button. Yet, this edit seems not to be enough for me to change my vote on the question. I had to make a dummy edit in order to be allowed to change the vote.
Since I can't see a good reason why clicking on an "edit" button and then clicking on "Save Edits" isn't considered an edit, I file this under
bug. If this is by design, I'd be very curious about the rationale.
(BTW: I have seen Request change in behaviour: Vote too old to be changed, unless post is edited and Vote too old to be changed, unless post is edited and don't think they're exact duplicates.)