title: ambiguous between two completely identical functions
body: <p>I tried updating an MVC3 project and now I'm getting this really strange error in one of my functions.
  It looks really funny because it tells me it can distinct between two identical methods.</p>
  
  <pre><code>The call is ambiguous between the following methods or properties: 
  'System.Web.Mvc.Html.LabelExtensions.LabelFor&lt;TModel,TValue&gt;(System.Web.Mvc.HtmlHelper&lt;TModel&gt;, System.Linq.Expressions.Expression&lt;System.Func&lt;TModel,TValue&gt;&gt;, object)' and 
  'System.Web.Mvc.Html.LabelExtensions.LabelFor&lt;TModel,TValue&gt;(System.Web.Mvc.HtmlHelper&lt;TModel&gt;, System.Linq.Expressions.Expression&lt;System.Func&lt;TModel,TValue&gt;&gt;, object)'    
  </code></pre>
  
  <p>How?</p>