Unless my eyes deceive me it looks like the text on this post is not all the same size.
Nothing fancy was added to the text, this is the raw source:
It looks like [this topic](http://meta.discourse.org/t/there-is-no-way-to-view-a-global-list-of-staff-user-invites/9032?u=sander78) between @sam and @codinghorror has a history of being in multiple places. Judging from this: http://meta.discourse.org/t/there-is-no-way-to-view-a-global-list-of-staff-user-invites/9032/10?u=sander78 This new topic has @sam as the topic starter. However, on the mail list you see @codinghorror as such: <img src="//discourse-meta.s3-us-west-1.amazonaws.com/original/2X/c/cbc52d20a23dfa1712f4bb60a262f78a4be2e22d.png" width="690" height="32"> So... I guess that is a bug?
It seems that the second bit of text has a different CSS class than the first one. Couldn’t find out what yet.
Edit: ha, it happens here as well: first text is normal, then after the screenshot it’s bigger and after the code block it’s normal again.