[This is different from this question: Cancelling an Upvote (Downvote), as this question here does not relate to which UI element to use, but relates to the conditions that must hold to change or cancel a vote.]
The following sequence has happened to me twice now. I'm wondering if it's a bug, a feature, or my not using the software correctly:
- A question has some problems.
- I post a request for clarification/improvement.
- No response for a while.
- Without clarification I think it's a bad question, so I give it a downvote.
- OP comes by later and clarifies.
- Okay, time to remove my downvote.
- I click (single standard left-click) on the down arrow, which had previously been black, not grey, which validly reflect my previous down vote.
- Down arrow looks as if it flickers to grey, then back to black, and I get a pop-up saying (roughly) "you've changed your vote a lot, so now it's locked (unless question gets edited).
- Sadly, now the question has a down vote that it doesn't deserve.
It's sort of as if my left click generates two left clicks. I don't have this issue anywhere else that I'm aware of. Any ideas?
(Technical details: Windows 7, Firefox, I do have NoScript blocking some sites that can lead to very odd behavior in live preview, but site is fully operational otherwise. This is the question it just happened on.)
Answer gathered from @amWhy's comments: Once your vote has been in place for a while (5 minutes, reportedly), you cannot change or cancel it until the question has been edited. There may be more complicated conditions that can happen, but these two points answer this question.
For others that may find this question, I'll recapitulate the answers to related issues:
To change your vote from up to down or from down to up: Just click on the other arrow.
To cancel your vote so it's as if you never voted: Click again on the arrow you previously chose, and it will go back to grey from black. Each arrow acts more-or-less like a toggle that also cancels the other arrow.