The activity page on the SO Community user's profile shows that he/she/it accepted several answers in mid-June. Why is Community accepting answers at all? At first I thought it might have something to do with Community Wiki posts or "spam/evil" posts, but the very first question on the list is a legit question, has an active, registered asker and and active, registered answerer.
While in the process of writing this question, I came to the conclusion that the Community user probably owns auto-awarded bounties. Is that the reason for these "accepted answers"? Some points for and against:
- All of the questions on that list have bounties that could be auto-awards — that is, they are equal to half the value of a possible full bounty
- The mouseover text on the bounties still says "This answer has been awarded bounty worth [value] by [promoter's name]" (emphasis mine); however, this is true even for obvious auto-awards like bounties worth +75, so it's probably a separate bug
- Bounty awards are no longer tied to acceptance of an answer, per the blog
- Surely there's been at least one auto-award since mid-June; but perhaps not coincidentally, the changes to the bounty system mentioned above were made around mid-June