Rails 3.2.2 has been released!

Rails 3.2.2 has been released. This release contains various bug fixes and two important security fixes. All users are recommended to upgrade as soon as possible.

Changes
For information regarding the possible vulnerabilities, please see the announcements here and here.
Some highlights from this release are:

• Log files are always flushed
• Failing tests will exit with nonzero status code
• Elimination of calls to deprecated methods
• Query cache instrumentation includes bindings in the payload
• Hidden checkbox values are not set if the value is nil
• Various Ruby 2.0 compatibility fixes

For a comprehensive list, see the commits on github.

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Source: http://weblog.rubyonrails.org/