On Wikis that use the MathML rendering mode by default, the visual editor does not work for math.
The JS console shows this.context.getSurface(...).executeComamnd is not a function
12:13:21.726 TypeError: this.context.getSurface(...).executeComamnd is not a function ve.ui.MWMathContextItem.prototype.onInlineEditButtonClick() load.php:163 oo.EventEmitter.prototype.emit() load.php:219 OO.ui.mixin.ButtonElement.prototype.onClick() load.php:1568 jQuery.event.dispatch() load.php:65 jQuery.event.add/elemData.handle() load.php:60 1 load.php:163:781
@Jdforrester-WMF I'm tempted to argue that this was a duplicate... but who cares about a bug that was resolved.
try http://en.wikipedia.beta.wmflabs.org/wiki/Math?veaction=edit ... in a private tab ... and quick edit will work as expected