[TxMt] MultiMarkdown Footnotes Issue

I experience a somewhat strange behavior with footnotes using MultiMarkdown -- in fact, footnotes stopped working all of a sudden.

Thus,

Text[^fn]

[^fn]: Footnote text

evokes the error message "Use of uninitialized value in substitution iterator at /Users/sbr/Library/Application Support/TextMate/Bundles/ Markdown.tmbundle/Support/bin/MultiMarkdown.pl line 1582, <> line 1."

MultiMarkdown at line 1582 is handling footnotes, but I cannot figure out what's wrong. As said, this worked before... And yes, I reverted to the version in the svn repository to ensure MultiMarkdown is not contaminated.

Did anyone else experience this before? Any help is greatly appreciated!

Thanks and regards - Stefan