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This seems... erm... stupid:

> == FAQ :The standard library is installed in /usr/local/lib/ruby/1.9.1 This version number is "library compatibility version". Ruby 1.9.2 is mostly compatible with the 1.9.2, so its library is installed in the directory.

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This is insane. I have just had to explain 3 people on #ruby-lang why my error log has 1.9.1 in it if I am running purely 1.9.2.

This tangentially breaks the principle of least surprise. I can't see any good reason for doing this. This will result in unnecessary head aches during debugging for months to come.

That always confused me before, but at least I know it's intentional.

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