there is no changelog posted, but I can tell you.  besides minor bugfixes, there are only two changes:

1: The Theme property of

The xamChart control provides a comprehensive set of 2D and 3D charts that allow you to visually display complex data easily and intuitively.

Toolbox Item: xamChart

Namespace: Infragistics.Windows.Chart

',event)" class="hsglossaryreference" title="Click to show a definition of this term">xamChart™ - The Theme property of the xamChart control has been changed from an enumeration to a string. This was done to be consistent with the other NetAdvantage for WPF controls as well as to allow for custom themes to be registered for and used by the XamChart control. (http://help.infragistics.com/Help/NetAdvantage/WPF/2008.1/CLR3.X/html/WPF_Breaking_Changes.html)

2: Fast rendering - in certain cases where a large number of datapoints must be displayed (e.g. 10k+ points in a scatterchart), the chart will render in GDI+ instead of WPF graphics.  this gives the control a major performance boost when one is needed.  these settings are configurable through myXamChart.Scene.GridArea.RenderingOptions.