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Yeah it's a really interesting demonstration of something that is just so darn useful that you're crazy not to use it (on your development machine), regardless of your complaints with it.

That's the main reason I'm not using RVM. I depend on `cd` to work, every time, rock solid, especially when my system is unstable. I can't risk having a dependency or bug in their `cd` script breaking my most commonly used shell command.

So then what did you use on your development machine to test your ruby apps with till now? What did you use if not RVM? I am happy that RVM exists and made my life as ruby developer much easier even if it overrides 'cd'. Also to note i never had problems with RVM. Your main reason not using RVM is poor, as if there were more options out there till now.

.bash_profile? How hard is that?

ruby==ruby 1.8.7 ruby9==ruby 1.9.2 jruby== jruby 1.6 jruby5==jruby 1.5

Yeah, real tough.

Agree - this seems like an invitation to problems. Are there any known issues with it?

for anyone curious, compare to https://github.com/wayneeseguin/rvm/blob/master/scripts/cd