Ruby on Rails

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 guidance would be appreciated. Could it be anything to do symbollic links?

My Ruby version:

MyRuby$ ruby -v

ruby 1.9.3p194 (2012-04-20 revision 35410) [i686-linux]

But...rails isn't happy

MyRuby$ rails -v

/usr/local/lib/site_ruby/1.8/rubygems/dependency.rb:247:in `to_specs': Could not find rails (>= 0) amongst [bundler-1.1.5, pg-0.14.0] (Gem::LoadError)

from /usr/local/lib/site_ruby/1.8/rubygems/dependency.rb:256:in `to_spec'

from /usr/local/lib/site_ruby/1.8/rubygems.rb:1200:in `gem'

from /usr/bin/rails:18

MyRuby$ $PATH

bash: /usr/local/rvm/gems/ruby-1.9.3-p194/bin:/usr/local/rvm/gems/ruby-1.9.3-p194@global/bin:/usr/local/rvm/rubies/ruby-1.9.3-p194/bin:/usr/local/rvm/bin:/home/steve/bin:/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/sm/pkg/active/bin:/sm/pkg/active/sbin:/home/steve/.rvm/bin: No such file or directory