Testing silverlight 2 beta 2 Button Style not working

Ok, so i believe we all wanted silverlight 2 beta 2 to come out but the thing is.... what about the new problems!!!!!

This code used to work... i had this button style in my app.xaml

<ControlTemplate x:Key="Buttons" TargetType="Button">
            <Grid x:Name="RootElement">
             <Grid.Resources>
              <Storyboard x:Name="MouseOver">
               <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="butHov" Storyboard.TargetProperty="(UIElement.Opacity)">
                <SplineDoub ...