To reproduce:
1) Create RAD FORM (Project)
2) Add a TableLayoutPanel
3) In 1 cell add TextBox and change the font... it expands.
4) In cell 2 add a RadTextBox and change the font. The control is not resized.

In addition RatTextBox has correct size at runtime. 

We should also add padding to the RadTimePicker

Workaround: 
this.radSpinEditor1.SpinElement.Padding = new Padding(2, 0, 0, 0);
this.radTimePicker1.TimePickerElement.Padding = new Padding(2, 0, 0, 0);

To reproduce: set  this.radMaskedEditBox1.MaskType = Telerik.WinControls.UI.MaskType.IP; and try to enter '300' for the first part of the IP address. A message pops up  explaining that the value is outside the valid range. This message can't be changed. It should allow localizing. In addition, a RadMessageBox should be shown as well.

To reproduce:

        Me.RadDateTimePicker1.Format = DateTimePickerFormat.Custom
        Me.RadDateTimePicker1.CustomFormat = "MM/dd/yyyy"

        Dim provider As MaskDateTimeProvider = TryCast(Me.RadDateTimePicker1.DateTimePickerElement.TextBoxElement.Provider, MaskDateTimeProvider)
        provider.AutoSelectNextPart = True

 If you type in 01/01/50, RadDateTimePicker displays 01/01/1950 which is correct. If you type in 01/01/2050, the system is again changing the century and display 01/01/1950 which is incorrect. 

Workaround: use a custom mask provider to customize how the autocompletion work:
    Public Class CustomMaskDateTimeProvider
        Inherits Telerik.WinControls.UI.MaskDateTimeProvider
        Public Sub New(mask As String, culture As CultureInfo, owner As RadMaskedEditBoxElement)
            MyBase.New(mask, culture, owner)

        End Sub

        Protected Overrides Function HandleKeyPress(part As MaskPart, e As KeyPressEventArgs) As Boolean
            Dim value As Integer = 0
            If Not Integer.TryParse(e.KeyChar.ToString(), value) Then
                Return True
            End If

            Dim stringValue As String = String.Empty
            If part.type = PartTypes.MiliSeconds Then
                Dim newValue As Integer = CInt((part.value / Math.Pow(10, (3 - part.len)))) * 10 + value
                part.value = newValue Mod CInt(Math.Pow(10, part.len))
            Else
                stringValue = part.value.ToString()
                If stringValue.Length = part.len AndAlso stringValue.Length >= part.maskPart.Length Then
                    stringValue = stringValue.Substring(1)
                End If

                If Me.AutoCompleteYear AndAlso stringValue.Length = 1 Then
                    stringValue = String.Empty
                End If

                part.value = Integer.Parse(stringValue & e.KeyChar)
            End If

            If part.type = PartTypes.Year AndAlso part.maskPart.Length = 2 Then
                Dim len As Integer = part.value.ToString().Length
                part.value = Integer.Parse(String.Format("{0}{1}", DateTime.Now.Year.ToString().Substring(0, 2), part.value.ToString().Substring(len - 2, 2)))
            End If

            If Me.AutoCompleteYear AndAlso part.type = PartTypes.Year Then
                Dim len As Integer = part.value.ToString().Length
                If len >= 2 Then
                    part.value = Integer.Parse(part.value.ToString().Substring(len - 2, 2))
                End If

                'If part.value >= 50 AndAlso part.value <= 99 Then
                '    part.value += 1900
                'ElseIf part.value >= 500 AndAlso part.value <= 999 Then
                '    part.value += 1000
                'ElseIf part.value < 50 OrElse (part.value > 99 AndAlso part.value < 500) Then
                part.value += 2000
                ' End If
            End If

            If part.value > part.max OrElse part.value < part.min Then
                part.value = value
            End If

            Return True
        End Function
         
    End Class

  Me.RadDateTimePicker1.Format = DateTimePickerFormat.Custom
        Me.RadDateTimePicker1.CustomFormat = "MM/dd/yyyy"

        Me.RadDateTimePicker1.DateTimePickerElement.TextBoxElement.Provider = New CustomMaskDateTimeProvider(Me.RadDateTimePicker1.DateTimePickerElement.TextBoxElement.Mask, Me.RadDateTimePicker1.Culture, Me.RadDateTimePicker1.DateTimePickerElement.TextBoxElement)

        Dim provider As MaskDateTimeProvider = TryCast(Me.RadDateTimePicker1.DateTimePickerElement.TextBoxElement.Provider, MaskDateTimeProvider)
        provider.MaxDate = Me.RadDateTimePicker1.DateTimePickerElement.MaxDate
        provider.AutoSelectNextPart = True
        provider.AutoCompleteYear = True

Thus, the year always be 2000+.

To reproduce:

            this.radTextBox1.NullText = "text";
            this.radTextBox1.TextBoxElement.TextBoxItem.NullTextColor = Color.Red;

Workaround:  this.radTextBox1.TextBoxElement.NullTextColor = Color.Red;

RadSpellChecker is also using MEF to load the default dictionary: https://docs.microsoft.com/en-us/dotnet/framework/mef/attributed-programming-model-overview-mef If MEF fails the dictionary will not load and the control will not spell check.

RadDataLayout.LayoutControl has Text property and it is not relevant to show RadMarkupEditor when changing the text.

How to reproduce: run the attached project on a system with an increased scaling - 200%

Workaround: the null text needs to be set at run-time and after subscribe the control to the CreateTextBlock event

public class MyTextBlock : TextBlockElement
{
    public override void DpiScaleChanged(SizeF scaleFactor)
    {
        base.DpiScaleChanged(scaleFactor);
        this.ResetLayoutCore();
    }
} 

this.radTextBoxControl1.TextBoxElement.CreateTextBlock += this.RadTextBoxControl1_CreateTextBlock; 
private void RadTextBoxControl1_CreateTextBlock(object sender, CreateTextBlockEventArgs e)
{
    e.TextBlock = new MyTextBlock();
} 

To reproduce: run the attached project, enter some text in the upper RichTextBox and use the buttons to style parts of the text. Click the Save button and you will notice that after correcting the words, the style is not preserved.

Workaround: use RadRichTextEditor which has a built-in spell checking functionality: http://docs.telerik.com/devtools/winforms/richtexteditor/features/spellcheck

How to reproduce: add a spellchecker to the form and configure it to spellcheck a multi line text box with a very long text.

Workaround: use RadTextBoxControl

How to reproduce: check the attached project and video

Workaround: set a minimum size to the control
 public partial class RadForm1 : RadForm
 {
     public RadForm1()
     {
         InitializeComponent();

         this.radTextBox1.MinimumSize = new Size(0, 20);
     }
 }

How to reproduce: 
radDateTimePicker1.DateTimePickerElement.ShowTimePicker = true;
radDateTimePicker1.Format = DateTimePickerFormat.Custom;
radDateTimePicker1.DateTimePickerElement.CalendarSize = new Size(330, 250);
radDateTimePicker1.ReadOnly = true;

Workaround: 
this.radDateTimePicker1.DateTimePickerElement.ShowTimePicker = true;
this.radDateTimePicker1.Format = DateTimePickerFormat.Custom;
this.radDateTimePicker1.DateTimePickerElement.CalendarSize = new Size(330, 250);
this.radDateTimePicker1.ReadOnly = true;

RadDateTimePickerCalendar calendarBehavior = this.radDateTimePicker1.DateTimePickerElement.GetCurrentBehavior() as RadDateTimePickerCalendar;
calendarBehavior.TimePicker.TimePickerElement.ReadOnly = true;

1. Provide the 'Ignore' button above the 'Ignore All' button 

2. If no text is entered in the 'Change To' text field and the 'Change' button is clicked, the highlighted suggestion should be used instead.

3. After the 'Change' button is clicked, the 'Change To' text box should be cleared so that users don't have to delete the text string before entering something else.

To reproduce: run the attached sample project, open the popup and try to to scroll the grid with using the mouse wheel. You will notice that the popup is immediately closed.

Workaround: 
    Private Sub PopupClosing(sender As Object, args As Telerik.WinControls.UI.RadPopupClosingEventArgs)
        If args.CloseReason = Telerik.WinControls.UI.RadPopupCloseReason.Mouse Then
            args.Cancel = True
        End If
    End Sub

Use attached to reproduce.

Workaround:
Use date format that does not display the entire month name. 

Use the attached project and the following steps:
When the application starts, the entire content of the picker control is selected (which is fine).
Now press the Del key to clear the entire content.
If you then try and type in a date any key you type is shown briefly and is then cleared.
It is impossible to type anything until you open the drop down calendar and select something other than 1-1-0001.

Once another date is selected you can type normally.
Open the drop down calendar and select 1-1-0001 again and the same behavior occurs again.
This bug occurs whether or not ShowCheckBox is true.

Workaround:
- The NullDate should be different that the MinDate

 radDateTimePicker1.NullDate = DateTime.MinValue.AddDays(1);