title: owin Error on first run after installing a customers site umbraco 7 site
body: <p>I get this error on a 7.3 umbraco build:</p>
  
  <blockquote>
    <p>The following errors occurred while attempting to load the app. -
    The OwinStartupAttribute.FriendlyName value
    'UmbracoDefaultOwinStartup' does not match the given value '' in
    Assembly 'umbraco, Version=1.0.5750.18164, Culture=neutral,
    PublicKeyToken=null'. - No assembly found containing a Startup or
    [AssemblyName].Startup class. To disable OWIN startup discovery, add
    the appSetting owin:AutomaticAppStartup with a value of "false" in
    your web.config. To specify the OWIN startup Assembly, Class, or
    Method, add the appSetting owin:AppStartup with the fully qualified
    startup class or configuration method name in your web.config.</p>
  </blockquote>
  
  <p>Any ideas? I've even removed owin.dll from the bin folder and the reference from the solution, also added to the web.config <code>&lt;add key="owin:AutomaticAppStartup" value="false" /&gt;</code> and still get the same error?</p>
  
  <p>Thanks</p>