FubuContinuations do not redirect when a simple checkbox is present on the input model?

endpoints.cs

 public class get_handler
    {
        public SignInModel Execute(SignInRequest request)
        {
            return new SignInModel {ReturnUrl = request.ReturnUrl, LoginFailed = request.LoginFailed};
        }
    }

    public class post_handler
    {
        private readonly IAuthenticationService _authenticationService;
        private readonly IUrlRegistry _urlRegistry;

      public post_handler(IAuthenticationService authenticationService, IUrlRegistry urlRegistry)
        {
            _authenticationService = authenticationService;
            _urlRegistry = urlRegistry;
        }

        public FubuContinuation Execute(SignInModel model)
        {
            var loggedin = _authenticationService.SignIn(model.UserName, model.Password, true);

            if (loggedin)
            {
                return FubuContinuation.RedirectTo(model.ReturnUrl.IsEmpty() ? _urlRegistry.UrlFor<HomeRequest>() : model.ReturnUrl);
            }

            return FubuContinuation.TransferTo(new SignInRequest { ReturnUrl = model.ReturnUrl, LoginFailed = true });
        }
    }

    public class SignInRequest
    {
        [QueryString]
        public string ReturnUrl { get; set; }
        [QueryString]
        public bool LoginFailed { get; set; }
	} 

    public class SignInModel
    {
        public SignInModel()
        {
            ReturnUrl = "";
        }

        public string UserName { get; set; }
        public string Password { get; set; }
        public bool RememberMe { get; set; }
		[Hidden]
        public string ReturnUrl { get; set; }
        public bool LoginFailed { get; set; }
    }

form.html

<script>
$(document).ready(function() {
        var username;
        var $form = $('form');
        var $username = $('input[name=UserName]');
        var $password = $('input[name=Password]');
        var $rememberme = $('input[name=RememberMe]');

        $form.on('submit', function() {
          username = $rememberme.prop('checked') ? $username.val() : '';
          localStorage.setItem('signin:username', username);

          //For some reason fubu doesn't like to redirect if the rememberMe field is there.
          $rememberme.remove();
          $('label[for=RememberMe]').remove();
        });

        username = localStorage.getItem('signin:username');
        if (username) {
          $username.val(username);
          $rememberme.prop('checked', true);
          $password.focus();
          return;
        }
        $username.focus();
});
</script>
//... html ...
<form action="${ this.Urls.UrlFor(new Web.Handlers.user.signin.SignInModel())}" method="POST">
  <InputFor property="ReturnUrl" />
  <ColumnFor property="UserName" />
  <ColumnFor property="Password" />
  <ColumnFor property="RememberMe" />
        
    <div class="input controls">
      <button type="submit" class="btn btn-primary">Log in</button>
    </div>
  
  <div class="control-group">
    <label class="control-label">&nbsp;</label>
    <div class="input controls">
      ${ this.LinkTo<Web.Handlers.user.password.request.PasswordResetGenerateRequest>().Text("Forgot your password?") }
    </div>
  </div>

</form>

registry.cs

Scan(scan =>
  			{
					//web assembly
					scan.TheCallingAssembly();

//// snip

					//fubuvalidation
					scan.AddAllTypesOf<IValidationRegistration>();
					scan.AddAllTypesOf<IFieldValidationSource>();
					scan.AddAllTypesOf<IValidationSource>();
					scan.AddAllTypesOf<IValidated>();
					scan.AddAllTypesOf<ITemplatePartial>();
				});