Footnotes that are links don’t appear. For example:
[^1] [Mobile Retail: Almost Half European Shoppers Use Smartphones for Impulse Buys](http://www.ibtimes.co.uk/mobile-retail-almost-half-european-shoppers-use-smartphones-impulse-buys-1450177)
Will appear as a blank line with a subscript ‘1’ at the start, but no link. If I put an extra space before the link, then it appears.
FT Version 2.0.2 (738), OS X Yosemite v10.10.1.