title: Random query string appears in react-router
body: <p>Looks very strange, when I open the <strong>/</strong>, the browser will display something like <code>/#/?_k=dlo2cz</code> in the address. The random query string value changes every time when I refresh the page or switch to other route.</p>
  
  <p><a href="https://i.stack.imgur.com/wn7F9.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wn7F9.png" alt="enter image description here"></a></p>
  
  <p>The code were copied and pasted and on <a href="https://github.com/rackt/react-router" rel="nofollow noreferrer">react-router</a> branch <code>1.0.0-rc1</code>.</p>
  
  <pre><code>import React from 'react';
  import { Router, Route, Link, IndexRoute } from 'react-router';
  
  
  const App = React.createClass({
    render() {
      return (
        &lt;div&gt;
          &lt;h1&gt;App&lt;/h1&gt;
          {/* change the &lt;a&gt;s to &lt;Links&gt;s */}
          &lt;ul&gt;
            &lt;li&gt;&lt;Link to="/about"&gt;About&lt;/Link&gt;&lt;/li&gt;
            &lt;li&gt;&lt;Link to="/inbox"&gt;Inbox&lt;/Link&gt;&lt;/li&gt;
          &lt;/ul&gt;
  
          {/*
            next we replace `&lt;Child&gt;` with `this.props.children`
            the router will figure out the children for us
          */}
          {this.props.children}
        &lt;/div&gt;
      )
    }
  });
  
  const Message = React.createClass({
    render() {
      return &lt;h3&gt;Message&lt;/h3&gt;
    }
  });
  const About = React.createClass({
    render() {
      return &lt;h3&gt;About&lt;/h3&gt;
    }
  });
  
  const Inbox = React.createClass({
    render() {
      return (
        &lt;div&gt;
          &lt;h2&gt;Inbox&lt;/h2&gt;
          {/* Render the child route component */}
          {this.props.children || "Welcome to your Inbox"}
        &lt;/div&gt;
      )
    }
  })
  
  
  // Finally, we render a &lt;Router&gt; with some &lt;Route&gt;s.
  // It does all the fancy routing stuff for us.
  React.render((
    &lt;Router&gt;
      &lt;Route path="/" component={App}&gt;
        &lt;Route path="about" component={About} /&gt;
        &lt;Route path="inbox" component={Inbox}&gt;
          {/* Add the route, nested where we want the UI to nest */}
          &lt;Route path="messages/:id" component={Message} /&gt;
        &lt;/Route&gt;
      &lt;/Route&gt;
    &lt;/Router&gt;
  ), document.body);
  </code></pre>