We are happy to report that we have resolved the bug that we identified in the initial 4.3 release, and that the new and improved OpenCalais 4.3 is up and running on all servers.
 
As a quick reminder, here are the new features and expanded capabilitites of the OpenCalais service.  As always, please let us know if you run into any issues or have any questions.
 
New in OpenCalais 4.3
 
Improved ‘Social Tags’: We are expanding on our popular Social Tags categorization technique by adding more generalized, aggregate tags.
 
For example, if a blogger is comparing the racing performance of sports cars like the Ferrari 308 GTB and Porsche 959, OpenCalais 4.3 will suggest auto racing and motorsport as Social Tags, in addition to the more obvious sports cars.
 
NEW! ‘News Names’: We are instituting a process of name normalization that represents a first step toward our more robust vision for person disambiguation. Whenever a partial or extended name appears in content, OpenCalais 4.3 will return the names it finds as usual, but will now also suggest the most commonly used form of that same name.
 
For example, for articles containing Barack Obama, Obama or Barack Hussein Obama, OpenCalais will suggest not only the partial or extended name it found, but also the more frequently used Barack Obama.
 
New Entities, Facts and Events in English, including:
 

• New Natural and Manmade Disaster attributes that reveal these disasters’ effects
• Supporting data for upcoming events that will enable OpenCalais to recognize new Movies, Music Albums, etc., as well as anticipated Medical Treatments
• More Political Events and new items such as Diplomatic Relations, Political Endorsements, Poll Results and Voting Results
• Enhanced Person Career extraction that includes political party affiliations where those are included in the text.

 
The 4.3 release also features improved Simple Format and Microformat outputs, as well as several extraction bug fixes. For technical details, please see the full release notes here.