Markdown "lib" option breaks footnotes

[DLange]

v1.21 of the markdown plugin introduces the new "lib" option. Using that footnotes are not rendered (and linked) properly anymore. They show up as [^1] in the text instead of a superscript 1. There is also no link to the footnote anymore. Using the (non-default) "classic" option, footnotes work again.
I'm using the bulletproof template.

From the changelog of PHP Markdown Lib 1.3 (11 Apr 2013) on http://michelf.ca/projects/php-markdown/:
"Changed HTML output for footnotes: now instead of adding rel and rev attributes, footnotes links have the class name footnote-ref and backlinks footnote-backref."

[Timbalu]

Ah fine. Thanks for noting this changed behaviour.