When viewing a product node, how to show/ enable the original node title?
I found out that within the commerce_kickstart_product_ui_preprocess_page function the node title of product nodes is being set to '', for what reason ever. I wrote a custom module with weight higher than 50 and re-enabled the title:

function mymodule_preprocess_page(&amp;$vars) {
  // make the title display available again
  $product_display_types = commerce_product_reference_node_types();
  if (isset($vars['node']-&gt;type) &amp;&amp; isset($product_display_types[$vars['node']-&gt;type])) {
    $vars['title'] = $vars['node']-&gt;title;
  }
}