Laravel-错误消息未转换为实际错误消息，以“”开头；验证&”；

我在Laravel中尝试表单验证时遇到了问题，这很奇怪，因为它通常只起作用。

在我的用户模型中，我创建了验证规则：

public static $rules = array(
    'firstname'=>'required|min:2|alpha',
    'lastname'=>'required|min:2|alpha',
    'email'=>'required|email|unique:users',
    'password'=>'required|alpha_num|between:8,12|confirmed',
    'password_confirmation'=>'required|alpha_num|between:8,12',
    'telephone'=>'required|between:10,12',
    'admin'=>'integer'
);

在我的用户控制器中，我只定义验证通过时的操作，如果没有通过，则用户会被重定向回错误：

public function postCreate() {
    $validator = Validator::make(Input::all(), User::$rules);
    if ($validator->passes()) {
        $user = new User;
        $user->firstname = Input::get('firstname');
        $user->lastname = Input::get('lastname');
        $user->email = Input::get('email');
        $user->password = Hash::make(Input::get('password'));
        $user->telephone = Input::get('telephone');
        $user->save();
        return Redirect::to('users/signin')
            ->with('message', 'Thank you for creating a new account. Please sign in.');
    }
    return Redirect::to('users/create-account')
        ->with('message', 'Something went wrong')
        ->withErrors($validator)
        ->withInput();
}

出现以下错误：

在视图中，我显示错误（如果存在）：

@if($errors->has())
    <div id="form-errors">
    <p>The following errors have occurred:</p>
    <ul>
        @foreach($errors->all() as $error)
            <li>{{ $error }}</li>
        @endforeach
    </ul>
    </div><!-- end form-errors -->
@endif

我遇到的问题是，当提交一个空表单时，它的输出是：

validation.required
validation.required
validation.required
validation.required
validation.required
validation.required

代替：

The firstname field is required.
The lastname field is required.
The email field is required.
The password field is required.
The password confirmation field is required.
The telephone field is required.

如果有人能告诉我为什么会发生这种事，或者我错过了什么，我将不胜感激！