A couple of months ago, Kaestur Hakarl wrote a comment in Feedback on MathJax TeX rendering which didn't receive enough attention:

... Is it possible for the re-rendering pass to also cover expanded comments?

Hopefully, we can address that suggestion now.

I know for sure that it is possible to re-render equations in the comment section. A good place to start is this.

• Thanks for posting this as a question. Oct 26 '10 at 21:30
• Oct 27 '10 at 9:48
• @KennyTM: It's not exactly the same issue, however, it could be solved in the same way. The solution would be to run something like 'MathJax.Hub.Queue(["Typeset",MathJax.Hub,comments]' each time a change occurs in the comment section (excluding, of course, the textarea). Actually, you wrote a possible solution, however, it hasn't been implemented since August. Oct 27 '10 at 19:23