User blog comment:Kirkburn/Technical Update: March 3, 2015/@comment-452-20150304224041

Does anyone else notice a change in the font used in diffs (It looks "thinner"), or is that just a side effect of me clearing my browser settings?

edit: Just me, idkwtf is going on. Apparently my Arial font is corrupt or something.

Incidentally, this issue went away when I next updated my browser.