As of ruby 2.0 .rvmrc has been deemed deprecated. To circumvent hassle moving forward you can generate two new files that will tell the project which ruby version to use along with which gemset to use. To accomplish this, use the command below.
rvm --create --ruby-version use ruby-version-number@gemsetname
rvm --create --ruby-version use ruby-2.0.0-p247@mycoolapp
This will create a .ruby-version file that contains "ruby-2.0.0-p247" and a .ruby-gemset file that contains "mycoolapp".