I had to clear my contact data the other day from settings/applications/manage applications/contacts storage to cure a googlemail account sync problem. It worked and the phone now syncs fine. But, I now have duplicates of all facebook events in all my calendars. Can I safely delete the data in settings/applications/manage applications/Facebook for HTC Sense? do you think if I did that that it would sort the problem? Would this cause issues with my contacts, as some are linked to Facebook friends, or would this sort its self out when it re-synced?