title: the_post_thumbnail not working with me
body: <p>I'm not super familiar with wordpress, but I've been working on getting my layout written as a theme so I can use the wordpress platform. For some reason I can't get the_post_thumbnail function working. 
  so when use this </p>
  
  <pre><code>the_post_thumbnail(array(100,100)); 
  </code></pre>
  
  <p>its show me this error</p>
  
  <pre><code>  Illegal offset type in 
  </code></pre>