A question for you iCal users: my fiancé restored her phone tonight and wanted to use the Set Up As New option. Her contacts and calendar are synced through iTunes on her Mac.
However, when trying to sync her info back, she got a warning that a sync would change more than 5% of the calendar on her Mac—which seemed to indicate it might get wiped. She restored from backup instead, but is still hoping to restore as new to start fresh.
So my question is: is it safe to restore as new and sync in her situation?