It would be nice if RadPdf Viewer would support page rotation.

When IsTabStop = False the focus is going through :

 *  RadAutoCompleteBox
 *  RadComboBox (when IsEditable is set to True)
 *  RadNumericUpDown
 *  RadMaskedTextInput
 *  RadDatePicker
 *  RadDateTimePicker

Available in the R3 2016 Release.

For RadAutoCompletebox, RadComboBox, RadDateTimePicker and RadNumericUpDown, the TabNavigationExtensions.IsTabStop attached property should be used to indicate whether the control is included in the tab navigation cycle.

For RadMaskedTextInput, MaskedInputExtensions.IsEditorTabStop attached property should be used.

It would be nice the DCTDecode filter to handle correctly images that are encoded in CMYK colorspace.

It will be nice to expose public API to allow custom touch handling.

Completed:
With 2016 Q1 version, a static TouchManager has been introduced allowing handling of touch events, gestures, and adding custom touch gestures.

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

The value should be updated only when Up/Down/PageUp/PageDown or Enter is pressed.

Annotations are not positioned correctly, when the vertical scrollbar is visible.

The fix is available in LIB Version 2014.3.1319.

Missing StaticResource error (ScrollBarStyle) is thrown when using implicit styles and merging the Telerik.Windows.Controls.RichTextBoxUI.xaml file.

Available in LIB version 2018.1.205, it will be also available in the R1 2018 SP2 Release.

This will preserve the exported image quality. Currently the only option to achieve this is through the EncodedImageData class. However, using this approach is not easy because the user have to know the width, height, color space and filters of the image.

Problem noticeable by observing growth in queued changes to be processed. 

The RibbonView TabStrip ScrollViewer is displayed unexpectedly when there are inactive ContextualGroups.

Constantly growing instances of EventHandler<TouchEventArgs> in real time data virtualization examples.

Resolved with 2014.1.414.

Compress/decompress of specific file using streams can be wrong when the compression level is specified to Deflated.

SelectedCells collection is not updated correctly after GridView's ItemsSource changed

Exception is thrown if the size of Fluid is 0 and you maximize the window.

Hitting dot or comma on the keyboard doesn't move the cursor after the decimal separator in the MaskedNumeric/CurrencyInput controls in Mac