On mobile, username and picture of editors shown before authors, making it easy to assume wrong author if you don't look closely.
Example:
If you just skim and don't carefully look for "edited" or "answered", it's easy to assume that the first person listed is the one primarily associated with the answer. This should probably go the other way around.
I keep making this mistake both on questions and answers. I think this is a significant usability problem. We already have some confusion over this with new users mistaking the editor for the author — now we're going to have that for everyone.
Simply swapping the two would be a big help, but I think it should go even further — maybe don't show the user pic for the editor, or make it smaller somehow.