Workaround: 
The vsdiffmerge.exe merge tool in Visual Studio 2017 is usually located here: C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\Common7\IDE\CommonExtensions\Microsoft\TeamFoundation\Team Explorer. You will need to create one additional folder named Ide inside the Team Explorer folder Then you can copy the vsdiffmerge.exe file from the Team Explorer folder to the newly created Ide folder. You can check the attached vsdiffmerge-path.png screenshot.

Then you can create the environment variable like this:
Variable name: VS120COMNTOOLS
Path: C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\Common7\IDE\CommonExtensions\Microsoft\TeamFoundation\Team Explorer\IDE

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

Extract the source in a folder like this: "Telerik UI for WinForms R3 2017"

Workaround: 
Remove the spaces in the path.

Workaround:
1. Explicitly set the font of the parent of the controls.
2. Use a custom theme with the FontSegoeUI8.25 repository: check the attached screenshot

Workaround: 
1. Explicitly set the font of the checkbox with code.
this.radCheckBox1.Font = new Font("Segoe UI", 9.0f, FontStyle.Regular);

2. Use the attached custom theme.

To reproduce:
1. Add HelpProvider on the form.
2. Add RadButton(or any other RadControl).
3. Use the following code:
this.helpProvider1.SetHelpString(this.radButton1, "RadButton help message.");
this.MaximizeBox = false;
this.MinimizeBox = false;
this.HelpButton = true;
4. Run the form, click form's help button and then click the button. - Help dialog is shown and instantly closed.

Workaround:
Subscribe to the control's HelpRequested event and show a tooltip.
this.helpProvider1.SetShowHelp(this.radButton1, false);
this.radButton1.HelpRequested += Control_HelpRequested;

private void Control_HelpRequested(object sender, HelpEventArgs hlpevent)
{
    Control control = sender as Control;
    if (control == null)
    {
        return;
    }

    hlpevent.Handled = true;
    RadToolTip tip = new RadToolTip();
    tip.Show(this.helpProvider1.GetHelpString(control), 3000);
}

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;
    }
}

To reproduce: if you set in the app.manifest file  <dpiAware>false</dpiAware>, the controls still scale when changing DPI.

Workaround:
Public Class RadForm1
    Protected Overrides Sub OnLoad(e As EventArgs)

        Dim allowTheming = DirectCast(GetType(RadForm).GetField("allowTheming", BindingFlags.Instance Or BindingFlags.NonPublic).GetValue(Me), Boolean?)

        Dim behavior As ThemedFormBehavior = TryCast(Me.FormBehavior, ThemedFormBehavior)
        If behavior IsNot Nothing AndAlso allowTheming.HasValue AndAlso behavior.AllowTheming <> Me.AllowTheming Then
            behavior.AllowTheming = allowTheming.Value
        End If

        If Me.IsDesignMode Then
            GetType(RadFormControlBase).GetField("initialFormLocation", BindingFlags.Instance Or BindingFlags.NonPublic).SetValue(Me, Me.Location)

            Return
        End If

        Dim mi As MethodInfo = GetType(Form).GetMethod("OnLoad", BindingFlags.Instance Or BindingFlags.NonPublic)
        Dim ptr As IntPtr = mi.MethodHandle.GetFunctionPointer()
        Dim formOnOnLoad As Action(Of EventArgs) = DirectCast(Activator.CreateInstance(GetType(Action(Of EventArgs)), Me, ptr), Action(Of EventArgs))

        formOnOnLoad(e)
    End Sub

End Class

Use attached to reproduce.

How to reproduce: check the attached incorrect-text-position.gif  video

Workaround: change the SolidDisabledBorder repository according to the attached custom-metro-blue-theme.gif video and theme

To reproduce: 
- Associate a tree to the bread crumb
- Set the control size to 0,0
- Auto size = true 
- Select a node from the tree -> the bread crumb size is not increased, thus it remains invisible.

To reproduce:
- Set ShowRootLines to true
- Apply one of the following themes: Aqua, Office2007, TelerikMetro, VS2012

Workaround:
- Open the theme in visual style builder
- Expand the RadTreeView in the ControlStructureWindow
- Select TreeNodeExpandItem and expand it in the Elements window
- Navigate to the PossitionOffset property and set its width to 1

Workaround - set the Visible property of the needed pages to true

The issue can be reproduced following the scenario:
1. Create theme for RadLabel and define its Image in the theme. The images should be different for the different element states of the label.
2. Use a RadThemeManager to apply the theme to the control in design time. The Image property will be serialized, assigned to the image of the default element state. Setting the local value of the property in this case prevents applying the images of the other states, defined in the theme.

To reproduce:
- Try running the tool on a 32-bit operating system.
- The tool reports that the correct version is not installed.
 
Workaround:
Manually create the registry key:
    HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\NET Framework Setup\NDP\v4\Full

The cre4ate the following DWORD 32-bitValue:
 Release 60636

This is shown in the attched iamge as well. 

Let's say that you have a ShapedForm in VS. You navigate to its Shape property and try to create a custom shape through the Shape Editor. However, at the end the shape that you have created will not be applied correctly to the form.

Example: Add a single tile in RadPanorama, set it with RoundRectShape(12) and set an image with size equal to the size of the tile. The image will be drawn outside the bounds of the shape.