ArgumentException thrown in system OnTouch event - windows-phone-7

Question

I have a simple application with two pages on it. The first page acts normally, and I have a button on the page that navigates to the second page.
However, when I get to the second page, any time I try to touch anything, the OnTouch event fires and an ArgumentException is thrown in the ListDictionaryInternal
However, I have nothing on the page that interacts with this OnTouch event, so I'm not sure what could be causing it.
The code to navigate to the new page:
string page = "valid";
NavigationService.Navigate(
new Uri("/Dialog.xaml?page=" + page,
UriKind.Relative)
);
The XAML of the page that crashes is very simple:
<Grid x:Name="LayoutRoot" Background="Transparent">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<!--TitlePanel contains the name of the application and page title-->
<StackPanel Grid.Row="0" Margin="12,17,0,28">
<TextBlock Name="AppName" Style="{StaticResource PhoneTextNormalStyle}"/>
<TextBlock Name="PageName" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle2Style}"/>
</StackPanel>
<!--ContentPanel - place additional content here-->
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
<Button Click="CancelDownload_Click" Opacity="1.0" Content="Cancel REST Request!" Background="Blue" Foreground="White" BorderBrush="Black" FontWeight="Bold" BorderThickness="1" x:Name="CancelData" VerticalAlignment="Center" Margin="90,327,90,291" Height="150" Width="300" Visibility="Collapsed" />
</Grid>
</Grid>
What could be causing the OnTouch to fail in such a way?
Thank you for any help.

Answer 1

As it turns out, thee was a hack from the main page I had used to disable the scrolling of PivotItems when interacting with a nested Panorama.
The code that caused the error:
Touch.FrameReported += (s, e) =>
{
if (e.GetPrimaryTouchPoint(MainItems).Action == TouchAction.Up)
{
MainItems.IsHitTestVisible = true;
}
};