There have been a lot of complaints and bug reports about the state of the $MathJax$ editing experience all around SE lately. We've heard you, and with a lot of help from the kind folks from $MathJax$ (a special shout out goes to Davide), things are finally moving along.

Today we're rolling out a beta version of the $MathJax$, PageDown and Markdown integration on meta.math.SE and math.SE, that addresses a bunch of issues. We chose math.SE, because it already proved to be helpful with $MathJax$ issues in the past (it is the only site that runs on the latest beta.mathjax.org bits).

So please be extra mindful of any $MathJax$ issues you may encounter in the following days, and please report any bugs here on meta.math.SE.

$P.S.$ Don't forget to disable the editing preview userscripts

$P.S. 2$ Here's a short list of fixes, provided by Davide:

• disabled the fast preview during editing
• disabled the assistive MathML during editing
• processSectionDelay = 0 during editing reduces the flickering and speeds up refreshes slightly
• disabling the noErrors extension during editing, so that actual error messages appear
• allow the editor to interrupt MathJax
• add support for CommonHMTL for the best results
• reset the \label{} data before each typeset to prevent multiple-defined label errors

### Update

The changes from this beta graduated network-wide in build rev 2016.4.25.3507

• I guess this is better than Al Pacino shouting "YOU'RE OUT OF MATHJAX! YOU'RE OUT OF MATHJAX! THIS WHOLE COURTROOM IS OUT OF MATHJAX!!!" – Asaf Karagila Apr 13 '16 at 16:55
• OOPS, there was an error on my list. This doesn't actually disable the assistive MathML extension (since after you stop typing, you might want to use your screen reader on the typeset version). Users are still allowed to disable it themselves in the MathJax contextual menu. – Davide Cervone Apr 14 '16 at 1:24
• Just enabled this network wide, before graduating it / replacing old code entirely. – m0sa Apr 25 '16 at 6:00
• @DavideCervone Do you want bug reports here, or do you also follow other metas? mathjax broken for no-braces superscript + subscript – Gilles Apr 26 '16 at 8:18
• @Gilles, I think you should create new meta posts for any issues with the editing code, since the code is now active everywhere, unless mosa disagrees. I do follow the MathJax tag on all sites, so I will get daily notification of new posts with that tag. As for the item on the CS site, that is not related to this update (see my post there). – Davide Cervone Apr 26 '16 at 14:17