Isn’t the “vote too old to be changed” a little too eager?
I read the question, skim through the answers... one of them doesn't seem to answer the question so I vote it down. I come back a few minutes later after making some toast. I read through the OP's question again and it seems my original take on the question was wrong, invalidating my downvote on the answer I mentioned earlier... But... I can't revert my downvote!
Surely this needs to be fixed, no?