ruby gems repositiory down
Problem: ERROR: http://gems.rubyforge.org/ does not appear to be a repository
Solution: in my case it was that the repository was down. I checked http://gems.rubyforge.org/ and it was not working. So the solution was to wait for it to work again.
The message displayed by gem is very unfortunate, cos it does not say that the repo is down. There are many other reasons for this message to appear probably not associated with the ups and downs of the site.
Great solution:)