The form fields are not displayed when loading specific pdf files.

RadMaps Silverlight BingMap provider stopped displaying tiles in 2022 due to change in Bing Maps service.

Check notes here:

https://docs.microsoft.com/en-us/answers/questions/799630/arcgis-map-services-stopped-loading.html

Either workaround or statement regarding the future of this feature is needed.

RTF documents that do not define the appropriate style types in the style definitions are not processable in RTB. While this is a deviation from the standard, MS Word manages to fix them and then open them.

When the MinTimeRulerExtent of a view definition is lowered (to the point that the view does not have a scrollbar) and the EnableSmallAppointmentRendering is true, the content of the group headers is not displayed. 

Scrolling performance in large spreadsheets is significantly worse when auto filters are enabled.

 

Here is the error:

Invalid XmlnsDeclaration occurs in assembly 'Telerik.Windows.Controls.GridView, Version=2018.3.1016.1050, Culture=neutral, PublicKeyToken=5803cfa389c90ce7'. XmlnsDeclaration references a namespace 'Telerik.Windows.Controls.MultiColumnComboBox' that is not in the assembly.

It is reproducible only in Visual Studio 2010 SP1.

Some documents containing embedded jpeg images with DCTDecode filter are not decoded correctly in RadPdfViewer for Silverlight

At this point not much else is known other than the stack trace. The stack trace suggests that this happens on selection done by dragging the mouse and perhaps the document is with incorrect structure.

The vertical scrollbar of the RadGridView control disappears when hosted in a RadExpander control with its ExpandDirection set to Right. Initially the scrollbar is shown but if you collapse and then expand the expander control, the scrollbar is missing.

To work this around, stop the RadExpander's animation.
<telerik:RadExpander telerik:AnimationManager.IsAnimationEnabled="False" />

Between the small delay of a moving off the opened submenu and back to a sibling if you click a radmenuitem the click is ignored unless you wait until the submenu is fully closed.  This results in the experience of the click not working after you scroll down the menu. Very easy to repro, only affect menuitems very near the opened submenu. Issue does not occur in WPF.
Attached is a visual example of a menu item that would not work if clicked

When importing an html file and the color of the text is marked as windowtext, the text is transparent.

This is reproducible in the Paging Before Grouping demo. If you remove the grouping by the Country column by clicking on the X button of the group, the indent of the group expander will not be collapsed. See the attached video. Note that this reproduces only once when the example loads.

reproducible in themes where foreground of cells is changed on selected (i.e. VisualStudio2013)

Workaround:
add cell template to the column

<telerik:GridViewDataColumn.CellTemplate>
    <DataTemplate>
        <TextBlock Text="{Binding Property, Converter={StaticResource converter}}" />
    </DataTemplate>
</telerik:GridViewDataColumn.CellTemplate>

For example, if you have a Mask="f", this allows you to enter long-date and short-time. The allowed value should look like this: "Sunday, December 30, 2018 12:00 PM". In other words the seconds and milliseconds are not available to enter and they should be 0. However, if you previously enter a value that contains seconds or milliseconds different than 0, they are cached in the internal LastKnowValidValue property and used when you enter a new value. So, the new value will re-use the seconds and milliseconds from the previous one.

When the SelectedValue property of the RadDateTimePicker controls is bound to a TimeSpan (10:13) and such time does not exist in the drop down, the SelectedTime property is set to null.

As a workaround, you can subscribe to the DropDownOpened and SelectionChanged events. In the DropDownOpened event handler, you can get the current time using the SelectedTime property. Then in the SelectionChanged event handler, you can set the preserved value to the SelectedTime property of the RadDateTimePicker. 

public partial class MainPage : UserControl
{
	private bool IsLoadedFirstTime = true;
	private TimeSpan? SelectedTime;
	public MainPage()
	{
		InitializeComponent();
		this.DataContext = new MainViewModel();
	}

	private void StartDatePicker_SelectionChanged(object sender, Telerik.Windows.Controls.SelectionChangedEventArgs e)
	{
		var control = sender as RadDateTimePicker;
		if(IsLoadedFirstTime && control.IsDropDownOpen)
		{
			control.SelectedTime = SelectedTime;
			IsLoadedFirstTime = false;
		}          
	}

	private void StartDatePicker_DropDownOpened(object sender, System.Windows.RoutedEventArgs e)
	{
		var control = sender as RadDateTimePicker;
		if(IsLoadedFirstTime )
		{
			SelectedTime = control.SelectedTime as TimeSpan?;
		}
	}
}