Behaviour change in RadioButtonList

Hi,

The behaviour of the RadioButtonList seems to have changed between version 4.5.0480 and
version 2009.1 (Build 500).

With the old version the following XAML works as expected:

<shared:RadioButtonList>
<shared:RadioButtonList.ItemsSource>
<x:Array Type="{x:Type sys:String}">
<sys:String>_400%</sys:String>
<sys:String>_200%</sys:String>
<sys:String>_100%</sys:String>
<sys:String>_75%</sys:String>
<sys:String>Fit _Width</sys:String>
<sys:String>Fit _Page</sys:String>
</x:Array>
</shared:RadioButtonList.ItemsSource>
</shared:RadioButtonList>

With the keyboard access keys being displayed and responding correctly. In the new version the access key text is just displayed as part of the text of the radio button.

How can I restore the old behaviour?

Thanks,

Vernon Larcombe

[Modified at 07/13/2009 08:34 AM]