After upgrading from magento 1.3 to 1.4, if your product headings used quotes " " or ampersands & , then magento may convert these into HTML and then escape that HTML counterparts hence showing e.g.:
"Thermo Balance" Tub & Shower Valve Rough In Valve
like:
"Thermo Balance" Tub & Shower Valve Rough In Valve
The fix is to go into "view.phtml" and change:
<h1 class="product-name">
<?php echo $_helper->productAttribute($_product, $this->htmlEscape($_product->getName()), 'name') ?>
</h1>to
<h1 class="product-name">
<?php echo $this->htmlEscape($_product->getName())?>
</h1>or (preferred) try the latest code from /base/default/template/catalog/product/view.phtml
<div class="product-name">
<h1><?php echo $_helper->productAttribute($_product, $_product->getName(), 'name') ?>
</h1>
</div>