Currently, when a tool is executed it is invoked again after commit. The tool cannot be canceled from sequential execution.

Convert the interfaces and base classes (i.e. non UI specific logic) to a portable library.
We intend our solution to share Models and View Models between WPF and Silverlight (and more in the future). Our intention is to use Portable Libraries to achieve this. The biggest issue we have is down to the Telerik assemblies. Classes and interfaces that are shared between WPF and Silverlight could/should be in a PCL assembly.

please add persian culture "fa-IR' to RadCalendar 
with thanks

Implement a command line version which can be integrated with TFS.

Support Documents (RichTextBox) assemblies

The LocalizationManager doesn't apply the ResourceKey if the Content/Text properties are defined in XAML between the opening and closing tag of the control - for example Button or a TextBlock control.

In UIElementExtensions, IsAncestorOf crashes when the element parameter is of type Hyperlink.

The xaml team recently reviewed the status of this issue and won't be addressing it in future. 

Optimize binary and text resources like fonts, images...etc. Especially for the RichTextBox.

Add support for DataVisualization assembly or prompt message that we don't support it right now.

Support PRISM / MEF in Xap minifier.

XamlParseException when minifying the XAP

Summer, Office_Silver, Office_Black Themes cannot be minified , after loading they dissapear from the "extracting" grid

The MaskedInput controls cannot be extracted from the Telerik.Windows.Controls.Input.dll

Telerik.Windows.Controls.Charting.dll cannot be minified

Create FileThumbnail control:
I would love to have an easy way to display the thumbnail preview of a file. The Windows Shell does it, but the pInvoke code required to make this work is excessive.
Something like this:
http://stackoverflow.com/questions/1439719/c-sharp-get-thumbnail-from-file-via-windows-api
Perhaps a "RadFileThumbnail" control?
The Windows API Code Pack for Windows 7 has something like this, but you lock yourself into Windows 7 by using it.
http://archive.msdn.microsoft.com/WindowsAPICodePack

If the Telerik.Windows.Controls assembly is referenced from a local folder whilst the Telerik.Controls.Navigation.dll is referenced from the installation folder, as soon as a control from Navigation is added in a UserControl, a design-time exception is raised.
The excpetion is "Error HRESULT E_FAIL has been returned from a call to a COM component."
StackTrace:    at MS.Internal.XcpImports.CheckHResult(UInt32 hr)
   at MS.Internal.XcpImports.Collection_InsertValue[T](PresentationFrameworkCollection`1 collection, UInt32 index, CValue value)
   at MS.Internal.XcpImports.Collection_InsertDependencyObject[T](PresentationFrameworkCollection`1 collection, UInt32 index, DependencyObject value)
   at System.Windows.PresentationFrameworkCollection`1.InsertDependencyObject(Int32 index, DependencyObject value)
   at System.Windows.Controls.UIElementCollection.InsertInternal(Int32 index, UIElement value)

Change the version of the assemblies so the Visual Studio start diferentiate them from the original

Not flushing the uploaded files, selection after downloading the Result.

Add support for Assembly Library Chaching in Xap Minifier