When running the chef-client with RubyGems 1.8 the following messages appear every time gems are processed or installed:
NOTE: Gem.source_index is deprecated, use Specification. It will be removed on or after 2011-11-01.
Gem.source_index called from /usr/lib/ruby/gems/1.9.1/gems/chef-0.10.0/lib/chef/provider/package/rubygems.rb:202.
NOTE: Gem::SourceIndex#search is deprecated with no replacement. It will be removed on or after 2011-11-01.
Gem::SourceIndex#search called from /usr/lib/ruby/gems/1.9.1/gems/chef-0.10.0/lib/chef/provider/package/rubygems.rb:76.
This is after running `gem pristine --all`, which fixed many messages about other gems after this upgrade.