Whenever there’s a change to the Discourse software here, there’s always a flurry of posts pointing out the various and subtle things that the change broke. This time, though, I think I’ve discovered something that was actually fixed: It appears that quotes of MathXL now work properly. I don’t think MathXL support is a standard Discourse feature, so it’s likely that this fix was accidental or incidental to some other change, but still, yay.
Example: e^{i\pi}+1 = 0