Thanks, JK - we're running AEM 6.1 SP1. I attempted to turn on logging for this by creating a debug and trace-level logger for 'com.day.cq.wcm.core.impl.servlets' but that got a single line in the log:15.07.2016 07:47:11.734 *DEBUG* [127.0.0.1 [1468583025705] GET /bin/wcm/heavymove HTTP/1.1] com.day...