Cumulative Hotfix 2 is the result of thousands of hours of review, development, and testing by the ColdFusion engineering team. These guys (and gals) review every bug submission, ask questions and gather feedback from many people within the CF development community, and work hard to address the issues in a timely manner.
Hotfix 2 covers major and minor issues dealing with JSON serialization, ORM relations, Solr indexing, cross-site scripting security, MS Exchange integration, and much much more. See the change list for more information.
A big thanks to the Adobe CF Engineering team for their ongoing, and ever increasing support, or the web's first application server.