More details here https://twitter.com/mrtnclzd/status/451926785672753152
Version: 1.23.0
Severity: major
OS: Windows 7
Platform: PC
URL: https://www.mediawiki.org/wiki/Talk:Typography_refresh/Archive_2#Default_system_fonts_should_be_given_preference_over_free_fonts_.28especially_on_Windows.29
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=63662