Links and details, along with updates as they happen, are available on the testing page at http://www.mediawiki.org/wiki/Article_feedback/Version_5/Testing_Feb_2013...
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The WMF Editor Engagement team has been updating the Article Feedback tool, improving both the back end architecture and the user experience in preparation for further deployments of AFTv5 to French and German Wikipedias.
For the week of 11 February 2013, the Editor Engagement team welcomes any reports of issues or problems with AFTv5. We have arranged a dedicated test environment for the latest version of AFTv5 and we can fully support any testers from the community who care to contribute their time and expertise to examining the new features.
The latest AFTv5 is fully implemented on the host at http://ee-prototype.wmflabs.org/wiki/Main_Page, in particular the page at http://ee-prototype.wmflabs.org/wiki/Special:ArticleFeedbackv5/Golden-crowned_Sparrow
Detailed descriptions of the new features are as always available in the AFTv5 documentation, but a brief overview of features to be tested contains:
Link for editors to see feedback on their articles
More filters for feedback page
Some of these new features may be tested by the casual user, but some features require special accounts or privileges in order to exercise them.
Testers who require special privileges to examine the more sophisticated aspects of AFTv5 are encouraged to reply to this message, update the Talk page for the test plan, or contact the Editor Engagement team directly for help.