In this question: facebook: why I can't send email from app to user? I was awarded a bounty on an auto-accept after bounty expiration. It also appears the question owner accepted my answer after the bounty expiration and partial award.
It was confusing to determine exactly what happened based on the information available on the site.
Most problematic is the alt-text on the checkmark by my answer, which is "The question owner accepted this as the best answer yesterday. This answer was awarded a bounty of 275 reputation"
Reading this, I incorrectly concluded that the owner accepted my answer, and then I was awarded a bounty, which left me wondering why the partial bounty award.
It would be nice to put the two sentences in the alt-text in chronological order (OK, maybe they already are chronological in a literal sense if bounty awards are a daily batch process, but you know what I mean).
It would also be helpful to use different text for auto-accepts, for example "This answer was auto-selected to receive a partial bounty of 275 reputation"