In this answer On a proof of the existence of tubular neighborhoods. and Neil Strickland's answer here Is the counit of geometric realization a Serre fibration? the laTex is not displaying correctly (in Firefox version 21.0). Oddly, it looks fine after I click the edit button. Anyone know what's going on? In the second case, I'm pretty sure it looked fine earlier today, before the upgrade.
Weirdly, I managed to fix Neil Strickland's answer by editing it to remove whitespace from the end of the post.
I fixed your answer by removing the backticks and changing the backslash-brackets to double-dollar-signs. I think the new system doesn't play nicely with backslash-brackets.
EDIT: See also the discussion here.
Here is another question which doesn't display correctly (but whose preview on editing does): Algebraic closure as a fibrant replacement?