title: create thumbnail with Symfony or PHP
body: <p>i use <strong>sfThumbnailPlugin</strong> for Symfony 1.4. I have problem... 
  For example:</p>
  
  <p>i set:</p>
  
  <pre><code> $thumbnail = new sfThumbnail(80, 100);
  </code></pre>
  
  <p>and if i upload image 700px/400px then this plugin make image 80px/40px instead of 80/100. If image is 400/700 this is ok. I know that be blurred. </p>
  
  <p>How can i fix? Or how can i make in clear PHP? </p>