I've just been doing an AS and there are posts showing up in the search results. When you click on it, the thread has gone - because they're in one of the boards that delete after 30 days. But the post title and text is still visible in the search result.
Hope I'm explaining that correctly, and just wondering if this is intentional, and whether people are aware that although the thread will delete the title and part of the 1st post will remain visible on a search.