I spent a few minutes researching and typing up my answer, only to find that a few minutes later, he posted his own solution. (My answer may not have been the correct solution, so I don't mind not getting the award).
While this could just be considered a coincidence, I decided to look into his bounty offering habits. It turns out he has offered a number of bounties, most of which were never awarded, while many of his questions were answered and accepted by himself.
Occasional bounties on your own questions that you resolve I can believe, but not most, especially when it took a whole month for you to get your first response, then come up with your own magical solution just a few minutes later.
I know that ultimately, he's not getting that rep back, even if he accepts his own answer. However, I feel that it's an unfair waste of everyone else's time to play the bounty system this way.
So my question: What do I do about this (besides bring it up on Meta)? Do I flag the question with my concerns in the custom box, do I send an email to the mods/staff? Do I ignore it and move on?