This is only a tiny request!
I just asked a question on Stack Overflow and got three answers. I marked one of them as answer and just out of politeness I wanted to both up-vote and leave a comment for them all saying "+1 - Thanks for the help", or similar.
15 seconds really is not a lot and I can easily wait, but can this be lifted for the question asker in their own question as I have run against this a few times and there surely must be others? ... If I had 5 or more answers, I can imagine it becoming annoying!