While searching for
degrees of field extensions, I discovered that the Latex is not being rendered properly for this question, but only in the search. When I visit the question, the box isn't there; it renders properly.
I made sure to research it, to ensure that it wasn't just like the temporary failure to render I get when I ask questions that make heavy use of
\def. But the problem persists.
I tested it out in both Chrome and Internet Explorer; both have the same problem.