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I wrote a comment to this question on math-stack-exchange.
The browser (both Chrome and Firefox) didn't take it very well, and spread it all over the webpage, such that both the 'edit' option and the 'delete' option are shadowed (unavailable):
How can I resolve this?
P.S.:
I kept adding comments, hoping I could get it fixed and then delete the previous ones.
I realized that the 'delete' option was unavailable only after repeating this several times.
Until this is fixed, you can delete those comments by opening your browser's Console (typically F12) then typing these lines of code, one at a time, and pressing Enter: (as it's rate limited)
$.post("/posts/comments/3829630/vote/10", {"fkey": $("#fkey").val()});
$.post("/posts/comments/3829648/vote/10", {"fkey": $("#fkey").val()});
$.post("/posts/comments/3829649/vote/10", {"fkey": $("#fkey").val()});
Note: you will not get any confirmation dialog, the comments will be deleted instantly.
To delete further comments this way, all you need is their ID which can be retrieved from the permalink. (the comment's timestamp is a permalink, e.g. https://math.stackexchange.com/questions/1869322/can-this-function-be-a-new-test-for-primality#comment3829630_1869322 and the ID is 3829630)
In case the timestamp itself is hidden, the comments are also available in your profile page, the title of each comment is the permalink with the comment ID.
Several ways how to get to the delete/edit button are suggested in the posts on Mathematics Meta on this topic, see: My comments got stretched across the screen, and it won't allow me to edit or delete the comment either.
To me, the simplest way seem to be changing the Math Renderer. (You can do this in the MathJax menu which you get after right click on a rendered formula. This post has a screenshot showing the menu.
You can try various renderers to see which allow you shorter comment. If nothing else, choosing Plain Source as Math Renderer should help with this. (And after fixing the comment you switch this back the the one you prefer.)
\rfloorto, say,), and then back, then it works. If you copy-paste with the dollar signs included it also works. There's some funky edge case getting called there. In any case, you've posted it as an answer so you can just delete your comments (or flag for deletion if you can't).\rfloor. Delete it and re-type it and it should work fine.<div id="sidebar">it should work.