I have used the
<sup></sup> HTML tags for exponentials and footnote numbers in SE posts for a few years now, and it worked as expected. For example, to render x^y, one can write:
However, the past week (past few days?) I have noticed that they have ceased to work. They make the number smaller, but the raising of the number above the base line no longer happens:
Unfortunately, for obvious reasons, can not get a screen shot of how it used to look.
Why is this? Has there been a recent background change? Happens in Chrome and Opera (I've not tried anything else).