Nintex Workflow 2007 (NW2007) contains a number of actions intended to be used by SharePoint administrators. This is due to the security context in which these actions run. Nintex Workflow 2010 (NW2010) introduces some changes in these actions to make then safer to enable for regular workflow designers. Please be aware that these changes may interfere with NW2007 workflows that were upgraded for SharePoint 2010 and NW2010. These changes will not take effect until a workflow is republished in the new environment.