In at least one questions ( How to compute molecular formula?) there is broken formatting, but only in the posted form. The preview view (if one were to try and edit it) shows what I believe is the correct output.

Text for the line in question:

WCl$_{6}$, WCl$_{14}$, WCl$_{18}$, and WCl$_{21}$.

How it is displayed on the site:

enter image description here

How it is previewed:

enter image description here

This appears to be a bug.

  • $\begingroup$ Please test stuff here: meta.chemistry.stackexchange.com/a/112/22 $\endgroup$ May 14, 2012 at 0:32
  • $\begingroup$ Does it show up as a bug for you as well? $\endgroup$
    – soandos
    May 14, 2012 at 1:01
  • $\begingroup$ Yep.. Found other strange stuff as well. I'll investigate later. $\endgroup$ May 14, 2012 at 1:03
  • 1
    $\begingroup$ chat.stackexchange.com/transcript/message/4595462#4595462 $\endgroup$ May 14, 2012 at 13:09
  • 1
    $\begingroup$ This definitely looks like the difference between the preview and server back-end code. See this reply for more details about the code changes. I'm wondering if the fix was only applied to the math.stackexchange.com site? $\endgroup$ May 14, 2012 at 13:18
  • $\begingroup$ @DavideCervone: Fortunately, the SE mods hang around beta sites, so we may not have to wait too long for an answer. $\endgroup$ May 15, 2012 at 1:13
  • $\begingroup$ Has anyone tested this on any other SE sites? So far as I know, the fix @Manis links to wasn't specific to Math.SE. $\endgroup$
    – Shog9
    May 15, 2012 at 13:37

1 Answer 1


MathJax developer Davide Cervone has created an improved parser for better separation of $\LaTeX$ and Markdown (thanks a lot!). We've tested it on math.se for a while, and since it has been working great, I have now enabled it everywhere. The bug you found is one of the issues that this new parser solves, so this shouldn't happen again.


You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .