I've just completed an upgrade of Magento from 1.5 to 1.9 following the command line guide at http://blog.chapagain.com.np/update-upgrade-magento-1-x-to-latest-version-via-both-browser-command-line/
along the way, some errors were encountered but eventually were all resolved through SO.
However, after the upgrade, with the index recreated and cache cleared, the category page and product page are no longer displaying the products, checking the HTML source sees that the HTML is being cut off after rendering the menu.
There are no errors being logged. All other pages are working fine, the products can be found and displayed through the search function.
Changing to another theme does not solve the issue.
Any help would be greatly appreciated.
Thank you.