I'm upgrading a Drupal 6 site that used Images to Drupal 7 and I'm having a problem. After I performed the migration, I enabled the core Image module then I went to the Content Migrate and migrated field_photo. Then I went to a node with an image and nothing was displayed. When I attempted to edit the node, I was greeted with this lovely message:
Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'image_node_form' not found or invalid function name in drupal_retrieve_form() (line 841 of /home/louusiteadmin/louunext.org/includes/form.inc).