I've recently bought a Samsung Galaxy Ace and am having a strange issue in the Contacts app, specifically with those contacts which are synchronised with Exchange. When opening the History tab for some of these contacts there will be duplicates of some of the email messages (also synchronised from Exchange) sent to or from the contact. When trying to open the messages, only one of each message will actually open successfully. The others will display a "message deleted" popup. It seems that these duplicates appeared after updating sychronisation settings for the Exchange account (specifically the "Amount to synchronise" option). I've tried restarting the phone and even removing and re-adding the Exchange account, but the duplicates remain. Does anybody have any ideas?