I have noticed several times that when answering a question, someone who wrote an earlier answer will edit their answer by adding the content of my answer to theirs (as an alternate solution, or to make their answer more complete).
This is often a good thing for the community, because we want accepted answers to be as good as possible, but it seems unfair to the people who made the effort to provide the original content.
This is inherently a problem with the fact that answers are not collaborative (i.e. the site is not a wiki) but is it possible to solve this problem in some clever way? Or is it something we just need to deal with?