[Rails] Problem with rails installation, even when running rails -v

Been happily using rails for some time, upgrading to latest stable versions along the way but over the last week something has changed, now rails isn't happy. Any idea on what might have changed? Given I'm on ruby 1.9.3 I can't see why when I call rails -v it is referring to ruby 1.8. Any

[Rails] Code Quality Tool Initiative

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