[bronson]

That's why you use Bundler. In my experience Bundler solves this problem 100%. Lock your gems and get Ruby from RVM and the chances of nasty surprises are next to nil.

I wish the Rubygems guys would put down the crack pipe though. They're the one problem in this setup and, admittedly, they're a massive problem :(

[bphogan]

Bundler didn't solve the Rake issue because by default, Rails doesn't put rake in the bundle :)

Another thing to learn.