title: warning: Insecure world writable dir when I run a ruby or gem command
body: <p>Not sure why I'm getting this, but I just installed RVM, the new Ruby 1.9, and reinstalled a bunch of gems, and I get this </p>
  
  <p>/Users/johnsmith/.rvm/rubies/ruby-1.9.1-p378/bin/gem:4: warning: Insecure world writable dir /opt/local/bin in PATH, mode 040777</p>
  
  <p>Everything still runs otherwise, but I was wondering if there was a way I could get rid of it.</p>