What's causing "support for RegExp patterns is deprecated" error?

railer:sphinx railer$ script/generate scaffold Dummy Gem::SourceIndex#search support for Regexp patterns is deprecated /Library/Ruby/Gems/1.8/gems/rails-2.1.1/lib/rails_generator/lookup.rb:211:in `each' is outdated        exists app/models/        exists app/controllers/

...

railer:sphinx railer$ script/generate scaffold Dummy Gem::SourceIndex#search support for Regexp patterns is deprecated /Library/Ruby/Gems/1.8/gems/rails-2.1.1/lib/rails_generator/lookup.rb: 211:in `each' is outdated       exists app/models/       exists app/controllers/

rubygems 1.3 is brand new, sounds like they've deprecated something that current versions of rails use. It's not an error, it's a warning that future versions of rubygems won't support this (and that rails should be fixed accordingly)

Fred