RadMessageBox  throws ArgumentException - "A circular control reference has been made. A control cannot be owned by or parented to itself." when using with MDI forms. 

WorkAround:
RadMessageBox.Show("Text");
RadMessageBox.Instance.Dispose();

RadMessageBox - SetThemeName method is not working correctly, after dispose on owner form.

Workaround - Reset the radMessageBoxForm field via reflection. For example:

            var field = typeof(RadMessageBox).GetField("radMessageBoxForm", BindingFlags.NonPublic | BindingFlags.Static);
            field.SetValue(null, null);

            RadMessageBox.SetThemeName("Office2007Black");

Default button focus is not correct and additional tab press is needed.

When HTML-formatted text is displayed in RadMessageBox, it is cut off on the right.

Add a details section to RadMessageBox, so that in mimics standard error messages.

When you are navigating repeatedly between the buttons in RadMessageBox using the arrow keys, at one of the steps none of the buttons is focused.

RadMessageBox - Buttons are not arranged correctly in RTL

To reproduce: Change the monitors positions in the settings pane and try out on both monitors.

FIX. RadRibbonForm - setting the FormBorderStyle property does not take effect

When a user double-clicks the OK button at design-time, an empty event handler is created.
However, this handler needs the WithEvents keyword in the Designer of the form.

If the theme of your Windows 7 is 'Windows 7 Basic' and you have a RadForm as an mdi child., when you maximize this form, you will notice that there is a gap of several pixels between the parent form title bar and the client part of the child form. This can be worked around as shown below:

Public Class MDIParent
    Public Sub New()
        InitializeComponent()
    End Sub

    Dim shouldGetSavedSize As Boolean = False
    Dim suspendResize As Boolean = False
    Dim formSize As Drawing.Size = Size.Empty

    Private Sub RadButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadButton1.Click
        Dim form As RadForm = New RadForm
        form.MdiParent = Me
        form.Show()
        formSize = form.Size
        AddHandler form.Resize, AddressOf Form_Resize
        AddHandler form.SizeChanged, AddressOf Form_SizeChanged
    End Sub

    Private Sub Form_SizeChanged(ByVal sender As Object, ByVal e As System.EventArgs)
        Dim form As RadForm = DirectCast(sender, RadForm)
        If Not form.WindowState = FormWindowState.Maximized Then
            If suspendResize Then
                Return
            End If
            formSize = form.Size
        End If
    End Sub

    Private Sub Form_Resize(ByVal sender As Object, ByVal e As System.EventArgs)
        Dim form As RadForm = DirectCast(sender, RadForm)
        If form.WindowState = FormWindowState.Maximized Then
            shouldGetSavedSize = True
            form.FormBorderStyle = Windows.Forms.FormBorderStyle.None
        Else
            If shouldGetSavedSize Then
                shouldGetSavedSize = False
                suspendResize = True
                form.FormBorderStyle = FormBorderStyle.Sizable
                form.Size = formSize
                suspendResize = False
            End If
        End If
    End Sub
End Class

Setting the ShowIcon to false hides the icon. You then decide to show the icon again, and you set ShowIcon back to true. However, the icon does not appear again.

Steps to reproduce:
Create & show a RadRibbonForm under Windows 8 and exception will occurred.

To reproduce:
- set your windows taskbar to auto-hide. 
- Add RadForm to a blank solution.
- Change the forms behaviour with the following one:

RadRibbonFormBehavior radRibbonFormBehavior1 = new RadRibbonFormBehavior();
this.radRibbonFormBehavior1.Form = this;
this.FormBehavior = this.radRibbonFormBehavior1;

- When you maximize the form the taskbar won't show like in the normal case.

it seems to be when I'm deriving from RadForm the NotifyPropertyChanged Doesn't seem to work

It is binding to the Text Propery of the dockwindow. what i am trying to do is bind to a propery of my class called FormText (This is not the Frm.Text but Frm.FormText) a completly diffrent property. This is not possible to do with the below code.

What I am ultimelty trying to do is have a class that is derived from RadForm so i can add a BindingSource to the form and load it with data.
I'm then trying to bind to the Possition and Item Count fo the BindingSource to show the user what record/how many records there are.

I need to re-bind this each time the tab is changed so the user is always seeing the records for the Selected form

Resolution: 
Scenario is not common and the issue is not related directly to our form. Since our RadForm is ISupportInitialize and in the case that the developer does not call Form EndInitialize method the Microsoft binding will reject the binding because Form IsInitialized property is false. So these methods must be called:
((System.ComponentModel.ISupportInitialize)(radForm1)).BeginInit();
((System.ComponentModel.ISupportInitialize)(radForm1)).EndInit();

To reproduce:
Add a RadForm and set its icon property. You will notice that the Form's icon is changed but it is not in the taskbar.

RadRibbonForm back stage button is missplaced when in maximized state with office2010SilverTheme

Workarouond: Set the margin when the window is set to maximize.

void Form1_Resize(object sender, EventArgs e)
        {
            if (this.WindowState == FormWindowState.Maximized)
            {
                this.radRibbonBar1.RibbonBarElement.ApplicationButtonElement.Margin = new Padding(3, 35, 3, 0);
            }
            else
            {
                this.radRibbonBar1.RibbonBarElement.ApplicationButtonElement.Margin = new Padding(3, 33, 3, 0);
            }
        }

Form command buttons incorrectly become visible in the following scenario:

1. Create a new Form.
2. Make the Form inherit from the RadRibbonForm class, or use the RadRibbonForm behavior.
3. Launch the application to display the new Form.
4. Click a few pixels below the Close, Maximize or Minimize buttons.
5. White buttons will appear with the same functionality as the Close, Maximize and Minimize buttons.

Workaround: set the property at run time

To reproduce:
-add a RadForm and specify its Icon property;
-modify Resources area on project's Properties -> Application tab in order to add Icon and manifest;
-run the project and you will notice that the specified icon is displayed in the taskbar. However, Alt+Tab panel does not display the certain RadForm's icon.