Another important think to note when using RVM is to not use 'sudo' when installing gems. It is easy get caught up in a README or tutorial and execute 'sudo gem

Another important think to note when using RVM is to not use 'sudo' when installing gems. It is easy get caught up in a README or tutorial and execute 'sudo gem install...' as listed in the document. Unfortunately, this installs the gem in root's environment, which isn't configured with RVM goodness using the default installation method and you'll quickly end up with all sorts of problems and obscure error messages.