I am having a the same problem, but when I tried to remove the path=data statement, I lost the binding to my items.
Any ideas?
<Grid x:Name="grdDates" DataContext="{Binding Source={StaticResource PQIProviderDetailAccess}}" >
<basics:DatePicker Text="{Binding Path=CreateDate, Mode=TwoWay}" Grid.Row="2" Grid.Column="1" />
<basics:DatePicker Text="{Binding OpenDate, Mode=TwoWay}" Grid.Row="3" Grid.Column="1" />
<Button x:Name="SaveButton" Content="Save Dates" Width="100"
Grid.Row="22" Grid.Column="0" Grid.ColumnSpan="2"
csla:InvokeMethod.TriggerEvent="Click"
csla:InvokeMethod.MethodName="Save"/>
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