I can't think of a coherent way to implement multiple acceptances (that doesn't invite abuse). Given that there's such a nice workaround, leaving it alone is the best option. Of course, I'm curious to hear explicit implementation ideas if you've got them.
]]>The question of reputation is, perhaps unfortunately, binned
Not really, the total loss of reputation is 15 points (you won't get rep for accepting your own answer) and if you're careful to say that your answer amalgamates two other ones, people will vote for others just as they would normally.
]]>In the meantime, one bit of advice I got on this from somewhere (on this forum, I think) was to make a community wiki answer that amalgamated the two helpful answers (with citation) and accept that. The question of reputation is, perhaps unfortunately, binned but at least it's clear to someone reading where the ideas for the correct answer came from and this is, ultimately, more important.
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