つづき

なんか見てみたら、すごいたくさんrailsが入っていたから一旦全部消してやった。

rails_app$ sudo gem uninstall rails

Select gem to uninstall:
 1. rails-2.3.8
 2. rails-2.3.9
 3. rails-3.0.0
 4. All versions
> 4

You have requested to uninstall the gem:
	rails-2.3.8
rails_tiny_ds-0.0.2.1 depends on [rails (= 2.3.8)]
If you remove this gems, one or more dependencies will not be met.
Continue with Uninstall? [Yn]  Y
Successfully uninstalled rails-2.3.8
Successfully uninstalled rails-2.3.9

You have requested to uninstall the gem:
	rails-3.0.0
acts_as_ferret-0.5.1 depends on [rails (>= 3.0)]
If you remove this gems, one or more dependencies will not be met.
Continue with Uninstall? [Yn]  Y
Successfully uninstalled rails-3.0.0

むははっ。むはっ。
どうなるかな？