Since I've gotten my iPhone 5s my Walgreens passbook app doesn't work anymore when they try to scan it at the counter at Walgreens. I've checked the number on the passbook app against what's on my account and it is the same. So what gives? Has anyone else had this problem? I'm wondering if it's an iOS 7 issue, Walgreens passbook issue, or simply a faulty Walgreens scanner issue.