User blog comment:Rappy 4187/Technical Update: May 20, 2015/@comment-3388044-20150521160714/@comment-126761-20150521162659

Could you point us to that H1 in the right rail? We've been switching leftover H1s to H2s (there generally should be only one H1 on a page - the page title), and will want to check for any that have been missed.

I'll make sure the team are aware of the oversized 'Popular blog posts' heading - it should match other right rail module headings.

For the fonts - I believe a specifically defined font-size on text would not be affected on Desktop XL. The typography changes generally only affect unstyled article text.