Visit https://en.m.wikipedia.org/wiki/Henry_Miller?mobileaction=beta
and you'll notice the heading visibly changes font.
This seems to only happen in beta and seems to be the unexpected side effect of pulling in ext.uls.webfonts.mobile (and jquery.webfonts)
I'm not sure why this is loading in beta but I'm concerned about this making it to the stable site, especially given the size of these modules. I can understand it being loaded conditionally in certain circumstances but just to support the Linux Libertine font seems a huge trade-off I'm not willing to encourage.