Ruby install error

Trying to install Ruby on Rails...

Updating Ruby Gems to latest version from 0.9.2 ..
.. Gems update failed : ERROR: While executing gem ... (Gem::GemNotFoundException) Could not find rubygems-update (> 0) in any repository Updating RubyGems... Bulk updating Gem source index for: http://gems.rubyforge.org Attempting remote update of rubygems-update

Where should it have found it?

Curiously, and the above was from a domain owner, on the same machine, I installed it as the Virtualmin admin via the install scripts, and it worked.

Thoughts on what might have caused this?

I then uninstalled Ruby, and have the domain owner install it, and, it worked fine that time (of course, the update was not needed).

Status: 
Closed (fixed)