I am having a weird behaviour after upgrading a Magento store from 1.7 to 1.9.2
When clicking on "Manage Customers" I am shown the "Products Bought by Same Customer Manager" table. If I click on one of the entries it shows the following fatal error:
Fatal error: Call to a member function getId() on a non-object in /includes/src/Mage_Adminhtml_Block_Customer_Edit.php on line 72
(I understand why, Magento is trying to edit a customer, with the ID and key values of the wring table)
This does not happen on my backup version of the 1.7 Version of the shop.
I believe it has something to do with this issue: http://forum.azmagento.com/how-to/fatal-error-in-manage-customers-gt-edit-magento-1410--32298.html
but I can't seem to make any progress here ... also my sql skills are rather lame :(
Any help form you guys or a hint on where to look would be very much appreciated.