Showdialog Xaml Exception with listview on Windows 8 only

问题

I'm in the process of writing a small application in Powershell making use of xaml gui. THe application works fine on Windows 7 and Windows Server 2012 at work, but on my home desktop, which runs on Windows 8 it throws an exception. After debugging a bit, I discovered the piece of xaml which makes the script crash.

[xml]$Xaml = @'
<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Windows Monitoring Framework" WindowStartupLocation="CenterScreen" Height="386" MinHeight="386" MaxHeight="400" Width="738" MinWidth="750" MaxWidth="750">
<Grid Margin="0,0,2,0">
    <TabControl Name="WmfTabControl">
        <TabItem Name="TabInfo" Header="Info">
            <Grid Margin="0,0,-1,0">
                <Label Name="lblInfoHostname" Content="Hostname" Height="25" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" VerticalAlignment="Top" HorizontalAlignment="Stretch" Margin="0,-1,0,0" Foreground="#FFFFFF" Background="#FF2E78E4" FontWeight="Bold" FontSize="14"/>
                <Label Content="Recent Alerts" HorizontalAlignment="Left" Margin="0,26,0,0" VerticalAlignment="Top" Height="24" Width="113" Background="#FF2E78E4" Foreground="#FFFFFF" FontSize="11" FontWeight="Bold"/>
                <ListView Name="lvRecentAlert" Margin="0,50,0,159">
                    <ListView.View>
                        <GridView>
                            <GridViewColumn Header="Date" Width="80"/>
                            <GridViewColumn Header="Service" Width="120"/>
                            <GridViewColumn Header="Alert" Width="300"/>
                        </GridView>
                    </ListView.View>
                </ListView>
            </Grid>
        </TabItem>
        </TabControl>
</Grid>
</Window>
'@
$Reader=(New-Object System.Xml.XmlNodeReader $Xaml)
$Form=[Windows.Markup.XamlReader]::Load( $Reader )

$Form.ShowDialog() | out-null

When I leave the part

                                <GridViewColumn Header="Date" Width="80"/>
                            <GridViewColumn Header="Service" Width="120"/>
                            <GridViewColumn Header="Alert" Width="300"/>

out the xaml, it works again.

The error thrown on my Windows 8 is:

Exception calling "ShowDialog" with "0" argument(s): "The file exists.
"
At     C:\Users\Willem\Dropbox\Scripts\Powershell\Tools\Windows_Monitoring_Framework\Windows_Monitoring_Framework.ps1:465 char:1
+ $Form.ShowDialog() | out-null
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : IOException

I've been looking for hours what the issue might be, but I'm kind of stuck. As I would like to continue working on the script at home, I would be very thankful if someone would know what the issue might be.

Grtz

Willem