HTML/JSP formatter became configurable.
XPath Search is improved and it's available in the HTML editor also not only the XML editor.
JavaScript editor provides code completion for jQuery.
JavaScript code code completion is improved.
For Struts 1.3, struts-config.xml editor does not generate elements which have no child nodes in the struts-config.xml.
And you can choose Java interfaces as the action class in the struts-config.xml editor. This would helps use Struts extended frameworks such as a framework which supports POJO action.
Support validation and code completion for indexedListproperty.