What is a historical lock, and what is it used for?
This question has a net upvote of 210 and has been favourited 71 times. It contains the tags
turtle. Yet if I look at the highest voted logo questions, it's not shown. Why not? I thought it might be because it's closed, but several questions that are listed at the highest-voted list are closed as well, so that's not it.
Is this some bug?