Since installing 1.6.1 on my iPhone, I've been getting an error every time I attempt to sync over Bonjour to my Mac: "The server certificate for https://airmac.local:63769/Omnifocus.ofocus" is signed by an untrusted root". After ensuring this was a bug and not someone trying to cause trouble, I click continue and the sync finishes normally. What's going on here, and how do I fix it?