Fonts seem irreparably broken, a problem crossing over for me (and others) from multiple browers. I'd humbly request that we consider whether there is there any way to install a button or something to effect a "revert everything to default font" functionality.

99% of what we post here is in the site's default font. Having posts spontaneously swap to/from Times New Roman randomly, forcing users to go back and edit and "switch everything to Arial in whatever the default size is, though it won't look right" seems like a bit of a waste of time.

 

I've had it happen multiple times. Looks fine in the edit box and then has multiple ones when posted.

 

This is my experience too. I'm not copy-pasting, just random font-switch weirdness. Safari, Firefox, and Chrome on Mac.