You can find a bunch of improvements and fixes in the service packs that are currently available for download under your accounts.
You can check the updated demos at:
Some of the high spots for Silverlight and WPF are:
For Windows Phone:
For more details and high spots of the SP1 of our Windows Phone controls check Deyan Ginev's post.
The full release notes can be found at:
RadControls for Silverlight | RadControls for WPF | RadControls for Windows Phone
Nikolay Atanasov is Product Manager in Telerik AppPrototyper Team