Secondary monitor error: issue in WPF or graphics driver?

I encountered a strange error in my WPF application and am trying to determine if it is a problem with WPF or my graphics driver so I can report it to the appropriate company. I have a Quadro FX 1700 with the latest drivers (197.54) on a Windows XP system running .NET 3.5 SP1 application.

I have two monitors, my primary on the left and my secondary on the right. The problem occurs when I maximize and then restore the child window of the main window to my main monitor. The child window is the correct size on the primary monitor, but it is drawn on my secondary monitor as if it were still maximized. Moving a child window on the primary monitor moves it on the secondary.

I made a sample application (code below) that causes this behavior.

1. Run the application and make sure the main window is on your main monitor.
2. Double click the main window. A green child window should appear.
3. Click on the green child window to expand it.
4. Click on the green child window to restore.

Can anyone else reproduce this issue? On my system, the green child is restored, but then it shows up on my primary and secondary monitors, not just the primary monitor.

App.xaml

<Application
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="DualMonitorBug.App"
    StartupUri="Shell.xaml" />

      

        
        
        
      

    

App.xaml.cs

using System.Windows;
namespace DualMonitorBug { public partial class App : Application { } }

      

        
        
        
      

    

Shell.xaml

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="DualMonitorBug.Shell"
    Title="Shell" Height="480" Width="640"
    MouseDoubleClick="ShowDialog" />

      

        
        
        
      

    

Shell.xaml.cs

using System.Windows;
using System.Windows.Input;

namespace DualMonitorBug
{
    public partial class Shell : Window
    {
        public Shell()
        {
            InitializeComponent();
        }

        private void ShowDialog(object sender, MouseButtonEventArgs e)
        {
            DialogWindow dialog = new DialogWindow();
            dialog.Owner = this;
            dialog.Show();
        }
    }
}

      

        
        
        
      

    

DialogWindow.xaml

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="DualMonitorBug.DialogWindow"
    Title="Dialog Window" Height="240" Width="320"
    AllowsTransparency="True"
    Background="Green"
    MouseLeftButtonDown="ShowHideDialog"
    WindowStyle="None" />

      

        
        
        
      

    

DialogWindow.xaml.cs

using System.Windows;
using System.Windows.Input;

namespace DualMonitorBug
{
    public partial class DialogWindow : Window
    {
        public DialogWindow() { InitializeComponent(); }

        private void ShowHideDialog(object sender, MouseButtonEventArgs e)
        {
           if (e.ClickCount == 1)
           {
               if (this.WindowState == WindowState.Normal)
               {
                   this.DragMove();
               }
           }
           else
           {
               this.WindowState
                   = (this.WindowState == WindowState.Normal)
                   ? WindowState.Maximized
                   : WindowState.Normal;
           }
        }
    }
}