title: magento Not valid template file /page/1column.phtml
body: <p>I had my site running fine on the devp. server. After I migrated the app to my production server. Everything worked until I added an extension and enabled it. The site still works but the product view page doesn't show up. Everytime I click on the product view page, this error is appended to my log file... </p>
  
  <pre><code>CRIT (2): Not valid template file:frontend/base/default/template/page/1column.phtml
  </code></pre>
  
  <p>I have checked the file it is alright, just same as the one working on the development server. I've tried disabling the only plugin (custom menu) that I have and still the problem persists. I've tried increasing memory_limit but it doesn't help either.</p>
  
  <p>Please help, I am stuck in the middle of nothing. </p>