SOLVED: Rails uninstall gem rake 0.9.2 from rvm

Again some time wasted to resolve a little problem with gems

I wanted to use the rake gem in it version 0.8.7 but in my rvm was also installed a 0.9.2 version.

I tryed to uninstall it with no success and the gem ask to run the

gem list -d rake

 rake (0.9.2, 0.8.7)
 Author: Jim Weirich
 Rubyforge: http://rubyforge.org/projects/rake
 Homepage: http://rake.rubyforge.org
 Installed at (0.9.2): /Users/spleenteo/.rvm/gems/ruby-1.8.7-p330@global
 (0.8.7): /Users/spleenteo/.rvm/gems/ruby-1.8.7-p330

wtf is that @global? so, the only way to remove it is:

$ rvm use @global
$ gem uninstall rake
$ rvm use ree

this worked fine for me.