The following happened to me at least a half-dozen times:
- Open a question page
- Vote on a question or answer, then go and do something else
- Navigate to the pre-vote version of the same page (either through having it opened several times during a Google search, pressing the back button or something else)
- Vote the same way once again.
- “You last voted on this [question or answer] an hour ago. Your vote is now locked in unless this [question or answer] is edited.” UPD: I misunderstood this message, see below. The question is moot.
While this isn’t terribly important, I understand this is a security mechanism triggering for no substantial reason. It would be good if this didn’t happen. (It would make sense for voting to be idempotent in this situation.)