The latest Service Pack of RadControls for Windows 8 brings another portion of great improvements to the controls as well as fixes of issues reported by our customers.
Among the improvements you can find a brand new Group UI in RadGrid for XAML
RadChart for XAML has been extended with Hit-test support for Line and Area series as well as a new HighlightInnerRadiusProperty in the PiesSeries and RenderablePoints routine for the ScatterSeries.
The entire list of fixes and improvements in the XAML and HTML controls can be found at:
Q1 2013 SP1 Release History 