i uses Touchdown as Exchange-Client on my mobile. I've an event with one category "Privat" in Outlook an on the mobile. Each time I update the event (e.g. the reminder) in Outlook, Touchdown dublicates the category and add one more "Privat" category on the mobile. After 7 updates, the event lists 8 "Privat" categories on the mobile. If I update now the event on my mobile, the 8 categories will be pushed to the Server and to Outlook too. This results in an Outlook-Event with 8 "Private" category-labels.