Nodequeue and features
Recently I tried to push an exported Drupal Feature to another install and failed miserably. After enabling and disabling various modules and features I finally disabled the lot, deleted the nodequeue and smartqueue tables and remove the nodequeue rows in the system table. Enabling nodequeue first and checking that it was working I was then able to go through and enable smartqueues, create the smartqueue we needed and enable the feature. Phew!