I don't know what the deal is, but it's weird on SO's part. If the issue is, as a sibling comment says, presentation html / js confusing G's crawler, then you email your account manager at Google and it will almost certainly be completely kosher to show the G scraper different material than is displayed, as long as the difference is true to the intent of the searcher. So you can present the G crawler just questions and answers with no javascript and no additional markup.