Similar to Material Themes Blending (https://docs.telerik.com/devtools/winforms/tools/visual-style-builder/working-with-visual-style-builder/material-themes-blending) provide an easy way to change the palette for the Fluent themes. 

The design of RadButton in ControlDefault Default state should be implemented through setting the BorderBoxStyle to OuterInnerBorder. When the default drawing is used, however, the inner border introduces visual glitches in the control's corners.

The ImageList property is visible in the Properties section of VisualStudio for RadTextBox, RadTextBoxControl etc.

How to reproduce: set the MinimumSize property of a RadButton in a DPI-aware app
Workaround: 
Public Class RadForm1
    Dim minMaxStack = New Stack(Of Dictionary(Of Control, Tuple(Of Size, Size)))()

    Sub New()
        InitializeComponent()
    End Sub

    Protected Overrides Sub HandleDpiChanged()

        Dim scaleFactor As Single = 1.0F
        Dim oldDpi = GetType(RadFormControlBase).GetField("oldDpi", BindingFlags.Instance Or BindingFlags.NonPublic).GetValue(Me)
        Dim currentDpi = GetType(RadFormControlBase).GetField("currentDpi", BindingFlags.Instance Or BindingFlags.NonPublic).GetValue(Me)

        If oldDpi <> 0 Then
            scaleFactor = CSng(currentDpi) / oldDpi
        ElseIf oldDpi = 0 Then
            scaleFactor = CSng(currentDpi) / 96.0F
        End If

        If scaleFactor = 1.0F Then
            Return
        End If

        Me.SaveMinMaxStates()
        MyBase.HandleDpiChanged()
        Me.RestoreMinMaxStates()

    End Sub

    Private Sub SaveMinMaxStates()
        If Me.minMaxStack Is Nothing Then
            Me.minMaxStack = New Stack(Of Dictionary(Of Control, Tuple(Of Size, Size)))()
        End If

        Dim minMax As New Dictionary(Of Control, Tuple(Of Size, Size))()
        Dim queue As New Queue(Of Control)()

        For Each ctrl As Control In Me.Controls
            queue.Enqueue(ctrl)
        Next

        While queue.Count > 0
            Dim ctrl As Control = queue.Dequeue()
            If TypeOf ctrl Is RadControl Then
                minMax.Add(ctrl, New Tuple(Of Size, Size)(ctrl.MinimumSize, ctrl.MaximumSize))
                ctrl.MinimumSize = Size.Empty
                ctrl.MaximumSize = Size.Empty
            End If

            For Each childControl As Control In ctrl.Controls
                queue.Enqueue(childControl)
            Next
        End While

        Me.minMaxStack.Push(minMax)
    End Sub

    Private Sub RestoreMinMaxStates()
        Dim minMax As Dictionary(Of Control, Tuple(Of Size, Size)) = Me.minMaxStack.Pop()
        Dim queue As New Queue(Of Control)()

        For Each ctrl As Control In Me.Controls
            queue.Enqueue(ctrl)
        Next

        While queue.Count > 0
            Dim ctrl As Control = queue.Dequeue()

            If minMax.ContainsKey(ctrl) Then
                ctrl.MinimumSize = minMax(ctrl).Item1
                ctrl.MaximumSize = minMax(ctrl).Item2
                minMax.Remove(ctrl)
            End If

            For Each childControl As Control In ctrl.Controls
                queue.Enqueue(childControl)
            Next
        End While

        minMax.Clear()
    End Sub
End Class

TextAlign property at RadTextBoxItem is not serialized at design-time.

If you set the GenerateMember of an element to false, it generally removes 'this' from the serialized code concerning the element. However, in the cases where we have a serialized cast in the designer, the word 'this' remains. Since the element is not a member of the form/user control, we get a compile error.

When you place several editor instances in a FlowLayoutPanel, for example RadTextBox, RadComboBox, RadDateTimePicker and set their Width to 100, this setting is lost when you run the project.

When you try to set a value to the ToolTipText property of a RadItem (let's say RadButtonElement), this setting is not serialized in the designer.

Register themes as components

Use attached project to reproduce. 

Workaround:
Use attached theme.

There is an exception when setting LightVisualElement.Text property to null.

1. Create a new project and add a RadGridView
2. Add a large number of columns (e.g 400)
3. Apply grouping
4. Run on a citrix environment or a virtual machine

Steps to reproduce:
1. Add a separator to a form
2. Set Orientation to Vertical
3. Set the theme to TelerikMetro or TelerikMetroBlue

You will see that the separator is not drawn correctly.

Resolution: The issue is no longer reproducible under OS Windows 2008 Server

1. Create a new project with RadCarousel.
2. Add some items.
3. On item click change the current theme.
4. Run the project and click an item.

How to reproduce: check the attached screenshot

Workaround create a custom RadPrintPreviewDialog
public class MyRadPrintPreviewDialog : RadPrintPreviewDialog
{
    protected override WatermarkPreviewDialog CreateWatermarkDialog()
    {
        WatermarkPreviewDialog dialog = new WatermarkPreviewDialog(this.Document);

        RadPageViewPage pageText = (RadPageViewPage)dialog.Controls["radPageView1"].Controls["pageText"];
        ((PlusMinusEditor)pageText.Controls["plusMinusEditorTextHOffset"]).TextBox.Width = 43;
        ((PlusMinusEditor)pageText.Controls["plusMinusEditorTextVOffset"]).TextBox.Width = 43;
        ((PlusMinusEditor)pageText.Controls["plusMinusEditorTextAngle"]).TextBox.Width = 43;
        ((PlusMinusEditor)pageText.Controls["plusMinusEditorTextOpacity"]).TextBox.Width = 43;
        RadPageViewPage pagePicture = (RadPageViewPage)dialog.Controls["radPageView1"].Controls["pagePicture"];
        ((PlusMinusEditor)pagePicture.Controls["plusMinusEditorImageHOffset"]).TextBox.Width = 43;
        ((PlusMinusEditor)pagePicture.Controls["plusMinusEditorImageVOffset"]).TextBox.Width = 43;
        ((PlusMinusEditor)pagePicture.Controls["plusMinusEditorImageOpacity"]).TextBox.Width = 43;

        return dialog;
    }
}

When the RadTextBox.Anchor is set to Bottom, Left, Right (and the AutoSize property is true), RadTextBox.Location is set to a wrong value when the form loads. This is a general RadControls issue.

Use attached to reproduce.

The restore button of RadForm has the following inconsistent styles: 

Office2010Silver - The image is identical for the maximize and restore states Office2010Black - The back color of the button is wrong when the form is started maximized.