My girlfriend recently got a Hero (I've had one for a while), and is having problems with contacts disappearing. If a contact is entered into GMail contacts using her laptop, it doesn't disappear. If a contact is entered directly on her Hero, some time later it gets removed. I suspected it was being removed when the phone synced with Google, so I tried a test where I created a new contact on her Hero, then forced a sync, but the contact remained. A couple of days later she told me that the new contact had disappeared some time later. I've never had this problem on my Hero. Any idea what the problem could be?