The most exciting feature is the new Style System. Now you have full control over every single formatting and semantic command available in the editor interface. Why having a limited interface to achieve a XHTML 1.1 experience? Enjoy a full featured editor, while well controlling how things work on it. No more <font> tags? Well, the system is so flexible that it is up to you to decide (but don't worry... no <font> tags by default .
Do you want more? What about blockquote support, the revamped Undo System, the Data Processor which makes it possible to handle non HTML data, and much more.
Read first before upgrading: