title: Magento Shopping Cart Breaks on Browser Back Button
body: <p>I'm using Magento 1.6.2, with quite a bit of customization - including a heavily modified shopping cart template.</p>
  
  <p>I'm having issues when a user clicks the browser's 'back' button, after adding an item to the shopping cart. I'm only able to reproduce this issue using Firefox. Chrome and IE work fine.</p>
  
  <p>Steps to reproduce.</p>
  
  <ol>
  <li>Open a specific product page, click 'add to cart'.</li>
  <li>You are forwarded to the shopping cart/preview page.</li>
  <li>Use the browsers 'back' button to return to the product view.</li>
  <li>The 'Add to cart' button is now completely nonfunctional. On products with custom required options, validation is not run. Really, nothing happens at all.</li>
  <li>Return to the product catalog. Locate and return to the same item used previously.</li>
  <li>Click 'Add to cart'. Everything works properly - you are redirected to the shopping cart, with an updated QTY.</li>
  </ol>
  
  <p>I have no idea where to begin. Anyone have any ideas?</p>
  
  <p>Production/live site: <a href="http://myerstownsheds.com/" rel="nofollow">http://myerstownsheds.com/</a> 'Request Quote' is actually the 'add to cart' button, we're not selling anything yet.</p>