About an hour ago I asked a question on Meta, and somebody recently upvoted it. Around the same time, somebody upvoted this question on the main site.
Something very weird is happening. To be clear, this does not occur on the main site; it only happens on this specific post. The reputation button at the top of the page keeps showing +5. If I click the button and then click outside the list of events the +5 goes away. But if I reload the page the +5 reappears.