I have problems with touch functionality under Win7. Please use the attached code to reproduce the issue.
The behavior for the ComboBox is that it won't open easily and a selection does not close the dropdown list.
<Window x:Class="WpfApplication7.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:WpfApplication7"
xmlns:ribbon="http://schemas.actiprosoftware.com/winfx/xaml/ribbon"
xmlns:docking="http://schemas.actiprosoftware.com/winfx/xaml/docking"
mc:Ignorable="d"
Title="MainWindow" Height="350" Width="525">
<Grid>
<docking:DockSite x:Name="dockSite"
Grid.Column="2" Padding="0" SplitterSize="5"
AreDocumentWindowsDestroyedOnClose="False"
UseHostedPopups="False"
IsLiveSplittingEnabled="False">
<docking:SplitContainer>
<docking:ToolWindowContainer>
<docking:ToolWindow x:Name="extendedSidebar"
Title="Properties"
IsOpen="True"
CanAutoHide="True"
CanClose="False"
CanFloat="False"
Padding="6,0,6,0"
ContainerDockedSize="500, 200">
<StackPanel>
<ComboBox>
<ComboBoxItem>Test1</ComboBoxItem>
<ComboBoxItem>Test2</ComboBoxItem>
<ComboBoxItem>Test3</ComboBoxItem>
<ComboBoxItem>Test4</ComboBoxItem>
<ComboBoxItem>Test5</ComboBoxItem>
<ComboBoxItem>Test6</ComboBoxItem>
<ComboBoxItem>Test7</ComboBoxItem>
</ComboBox>
</StackPanel>
</docking:ToolWindow>
</docking:ToolWindowContainer>
<docking:Workspace>
<docking:DocumentWindow BorderThickness="0">
</docking:DocumentWindow>
</docking:Workspace>
</docking:SplitContainer>
</docking:DockSite>
</Grid>
</Window>