Hello I had the same problem (hildon-home at 100%, missing some widgets). The only solution that I found is to deactivate every Widget that has something to do with the calendar. I'm syncing my calendar with to different devices. While a Calendar-Widget is running i'm not able to sync properly over bluethooth and a Nokia C5-00. PC-Suite syncing works fine. I assume that calendar-widget causes problems and crashes of hildon-home and the sync process. Hope it helps.