When I run bundle exec rspec spec/ on my Windows 7 64bit system, I receive the following error:

invalid switch in RUBYOPT: -F (RuntimeError)

I'm running ruby 1.9.2p136 (2010-12-25) [i386-mingw32] (installed in c:\Program Files (x86)\Ruby192), and bundler 1.0.15 (installed as a ruby gem).

Any clues on how to fix this issue?

Thanks,
Ben

ruby bundler
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