Each year, Thomson Reuters receives feedback from publishers after publication of the annual Journal Citation Reports in June. This feedback is carefully and systematically reviewed. As a result, selected JCR data may be modified and adjustments made to metrics such as the Journal Impact Factor. A re-evaluation of 2008 JCR data has been completed, and changes have been made to 55 journals. To see the final report: 2008 JCR September Update.

The 2009 edition of JCR will be available in June 2010.