Thank you for contacting us. We know about this issue and it will be fixed with the coming release.
On a side note, I'd like to inform you that we've just released an online tool that allows you to reduce the size of your Silverlight applications. For more information, please visit http://blogs.telerik.com/blogs/posts/10-06-10/telerik_assembly_minifier.aspx
All the best,
the Telerik team
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