If you recently updated your gems, you may see this nasty error:
can't activate rubyforge (= 0.4.5), already activated rubyforge-1.0.0]
or similar. If you do, the fix is simple. Simply run:
sudo gem uninstall -a rubyforge
Run the command twice just to be sure it’s removed. Then run:
sudo gem install rubyforge
This will clear up the issue.
