1) The core 'item_tagged' class was renamed to 'tag_added'.
2) The core 'item_untagged' class was renamed to 'tag_removed'.
3) The core 'message_read' class was renamed to 'message_viewed'.
4) The mod_forum 'userreport_viewed' class was renamed to 'user_report_viewed'.
5) The report_outline 'activity_viewed' was renamed to 'activity_report_viewed'.
6) The report_outline 'outline_viewed' was renamed to 'report_viewed'.
Adrian Greeve