Redmine

After building a new Centos 6.2 server, and moving a Redmine db from 0.9 Redmine to 1.4, the following deprecated warnings occur

[root@localhost redmine]# RAILS_ENV=production ruby script/about
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/inflector.rb:3:in `<top (required)>': iconv will be deprecated in the future, use String#encode instead.
NOTE: Gem.source_index is deprecated, use Specification. It will be removed on or after 2011-11-01.
Gem.source_index called from /usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.14/lib/rails/gem_dependency.rb:21.
About your application's environment
Ruby version              1.9.3 (x86_64-linux)
RubyGems version          1.8.22
Rack version              1.1.3
Rails version             2.3.14
Active Record version     2.3.14
Active Resource version   2.3.14
Action Mailer version     2.3.14
Active Support version    2.3.14
Application root          /var/www/html/redmine
Environment               production
Database adapter          mysql2
Database schema version   20120301153455

Are the deprecated warnings anything to worry about? If they are, what do I need to do to resolve them?

I'm not a Ruby person, so any help is gratefully received.