Board Thread:New Features/@comment-24739709-20150929231108/@comment-4079189-20151003161244

The example given in Help:PortableInfoboxes/CSS for using theme-source implies that the value of location will be lower-cased and used in a CSS selector (i.e., Africa &rarr; africa). This is not true. The value of the theme-source variable is case-sensitive.

I would prefer the lower-case policy that is implied by the documentation.