RVM is reporting:
cp: cannot overwrite directory /Users/me/.rvm/gems/ruby-1.9.3-p286@global/cache with non-directory /Users/me/.rvm/gems/ruby-1.9.3-p194@global/cache
but the symlink is there for both.
I have added a test here: rvm/rvm-test@cd099a4 but I could not reproduce your error, what was your command and can you gist it's trace?
gemset copy: create target dir only if source is not recognised, fix #…
scheduled for 1.16.16