Telerik Silverlight RadGridView - need to click buttons twice

Question

I have a Silverlight UserControl with a Telerik RadGridView control and a handful of button controls. The problem is that when I edit a cell in the grid view and then click any of the buttons the button command does not execute until; the button is selected a second time. The first press seems to remove the focus from the RadGridView and second succeeds in firing the bound command. Obviously, this makes for a terrible user interface. Does anyone know what might be going on here?

With the exception of the UI behavior everything else works fine.

Simplified XAML:

<StackPanel Orientation="Horizontal">
  <Button Content="Save" Command="{Binding SaveCommand}" />
  <Button Content="Close" Command="{Binding CloseCommand}" />
</StackPanel>
<telerik:RadGridView ItemsSource="{Binding StockItems,Mode=TwoWay}"
                     AutoGenerateColumns="False"
                     IsFilteringAllowed="False"
                     ShowGroupPanel="False">
  <telerik:RadGridView.Columns>
    <telerik:GridViewDataColumn DataMemberBinding="{Binding LabelGroup,Mode=TwoWay}"
                                Header="Label Group" />
    <telerik:GridViewDataColumn DataMemberBinding="{Binding Message,Mode=TwoWay}"
                                Header="Message" />
  </telerik:RadGridView.Columns>
</telerik:RadGridView>

Thanks in advance, Jim