My reminders sync very slowly, and sometimes not at all (unless I launch the app). Example I create a reminder on my Mac. I set the 'remind me' field to 2 hours in the future. I get alerts on both my Mac and my iPhone. I mark the reminder as completed on my Mac. The alert stays on the lock screen on my iPhone. I unlock my iPhone, and the reminders app stays badged until I launch it manually, at which point it syncs and loses the badge. Notification center displays similar behaviour, I am shown an outdated view until I tap 'clear', at which point my reminders sync again. Anyone else having the same problem? I have an iPhone 5 running iOS 6.0.1, and two iMac's running 10.8.2.