My version of Magento is 1.8.1.0. The problem is that I cannot see the "Reviews and Ratings" link under Catalog. Do you have any idea what could be causing this?
I have recently upgraded from Magento 1.6.2 to 1.8.1.0.
Thank you very much.
Check System > Configuration > Advanced > Advanced and see if Mage_Review is enabled there. If it's not there at all, check that there's a Mage_Review.xml in app/etc/modules.
If it's enabled and still not showing, you may be missing some Adminhtml .xml files.