Serverfault should require to state explicitly that no answer has been accepted (e.g. after every 2 weeks for OPEN questions).
I have seen a few cases in which answers that seem correct have not been accepted by asking person. It is hard to tell if something was missing in the question or the question has been "abandoned".
We used to have a feature here that helped with that, the accept-percentage below each questioner's user-badge. They went away about a month ago since they were causing more harm than good; people were refusing to answer questions from askers with low percentages and that's not what we're about.
Such a notifier does exist for brand new users. When they upvote an answer on their question, there is a popup that suggests that if its good enough, click Accept. Not all askers even bother to upvote though.
And finally, we have a dual feedback system here. Askers can Accept answers, and the rest of us vote for the one we think fits best. Sometimes these are two very different things; as a Moderator I occasionally get a flag worded like:
The accepted answer is wrong, completely wrong. It should be unaccepted.
Which I can't do a thing about. Only one person can Accept an answer.
Don't look to the Accepted flag as your sole source of truth.
