RangeError: 0x... is recycled object; rails-footnotes

I am using the GEM, rails-footnotes.

Preliminary testing shos that if I have it enabled ... I get the
  RangeError: 0x379597a is recycled object
strange message.

It seems that the entire GEM directory is .rb files (except for a
handful of .txt files).

Has anyone see this problem with rails-footnotes?

Any suggestions?