Today, David Heinemeier Hansson has announced the release of the first "Release Candidate" of Rails 2.2. Mike Gunderloy has put together a remarkable page listing all of the key changes individually. They include:

• Internationalization
• Significant Ruby 1.9 and JRuby compatability improvements
• HTTP ETag support
• Thread safety
• Transactional migrations
• Database connection pooling
• Memoization
• and, naturally, a lot more..

The Release Candiate's primary function is to allow people to test Rails 2.2 itself, as well as to get their applications up to scratch for the final Rails 2.2 release. Installation is quick and simple with gem install rails -s http://gems.rubyonrails.org -v 2.2.0

Go get 'em!

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