How do I troubleshoot autotest infinite loop problems?

I'm using cucumber, rails3, rspec2 and autotest. I'm trying to figure out why my features are infinitely looping. I suspect it some file being changed during the tests but I'm not sure which one. I've added some exceptions to my .autotest with no dice.

Are there any steps I can take to troubleshoot this problem?

It'd be cool if I could see what files are triggering a rerun or, at run time, what files are being watched/not watched.

here's my .autotest contents

require 'autotest/growl'

Autotest::Growl::clear_terminal = false

# Skip some paths
Autotest.add_hook :initialize do |autotest|
    %w{.git .DS_store db log tmp rerun.txt}.each { |e| autotest.add_exception(e) }
end