> These probably come from RDoc, so you can ignore them.

Yeah. It would be nice if RDoc could be called with a silent option and 
if RubyGems used this option by default. These warnings are scarring 
people ;)
--
David Heinemeier Hansson,
http://www.basecamphq.com/   -- Web-based Project Management
http://www.rubyonrails.org/  -- Web-application framework for Ruby
http://macromates.com/       -- TextMate: Code and markup editor (OS X)
http://www.loudthinking.com/ -- Broadcasting Brain