title: The TypeConverter for "FontWeight" does not support converting from a string
body: <p>After installing Visual Studio 2012 and opening a Silverlight 5 project I'm getting various <em>design time</em> errors related to TypeConverter, such as:</p>
  <blockquote>
  <p>The TypeConverter for &quot;FontWeight&quot; does not support converting from a string.</p>
  <p>The TypeConverter for &quot;Point&quot; does not support converting from a string.</p>
  <p>The TypeConverter for &quot;Thickness&quot; does not support converting from a string.</p>
  </blockquote>
  <p>That's not an exhaustive list, however.</p>
  <p>Examples of these being:</p>
  <p><code>&lt;Setter Property=&quot;FontWeight&quot; Value=&quot;Bold&quot; /&gt;</code></p>
  <p><code>&lt;RadialGradientBrush GradientOrigin=&quot;0.5,0.5&quot;&gt; ...</code></p>
  <p><code>&lt;Setter Property=&quot;Padding&quot; Value=&quot;0&quot; /&gt;</code></p>
  <p>Am I missing something obvious here, or is this a bug?</p>