Not entirely sure *what* went wrong here, but something did. There was a merge on the user account that somehow orphaned this question. I fixed that up, so the user should have access to the question once again.

In general, we ([the community managers](http://meta.stackexchange.com/questions/99338/who-are-the-community-managers-and-what-do-they-do)) have the ability to (dis)associate posts, so feel free to hunt one of us down to do the honours. There are usually a couple of us hanging out in the Teacher's Lounge.