I made a comment today on Stack Overflow and include the shortcode for a tag wiki link:
These used to automatically be converted into a link looking like this: jquery-validate
However now, it simply shows up in the comment as this exact plain text:
I didn't do anything different here, as all of my old comments using this same
tag: short-code are also broken where they used to display the tag wiki link.
It seems to still work from within questions, at least here on meta: jquery-validate