title: Google Analytics Event Tracking not recording numeric label values
body: <p>It looks like Google Analytics cannot track events with numeric values in the label.</p>
  
  <pre><code>_gaq.push(['_trackEvent', 'Videos', 'Play', '12345']);
  </code></pre>
  
  <p>Is it possible that GA can't record numeric values? I can't find anything in the GA docs.</p>
  
  <p>At the same time I also use Universal Analytics with the same event. But in Universal Analytics the numeric label is recorded.</p>