title: Error 500 when deleting lots of products
body: <p>I'm using Magento 1.4.0.1</p>
  
  <p>I'm trying to delete products based on their sku. I searched in the product manager and have found and selected the ~9000 products which must be deleted.</p>
  
  <p>When I try to delete them it hangs for a bit then gives me error 500. None of them get deleted.</p>
  
  <p>Any idea?</p>