Patryk Soika wrote:
> "whereis ruby" returns
>   ruby: /usr/bin/ruby /usr/lib/ruby /usr/local/bin/ruby 
> /usr/local/lib/ruby
>
> "which ruby" returns
>   /usr/local/bin/ruby
>
>
> Interestingly enough, on a whim, I just copied the program file into 
> /usr/bin and it seems to be working.  There was an older version 
> installed that rails didn't like, but that had been removed completely.
>
>   
Just make sure you are running the version you expect with

ruby -v

-Justin