I'm getting an assertion failure in ZSyncTouchHandler.m on line 1217 in connection:receivedResponse: when the zsActionRequestPairing action is passed. It might be that it shouldn't be being passed, but instead of dying, I added the following case to ignore it:
case zsActionRequestPairing:
// Ignore this code
DLog(@"Ignoring zsActionRequestPairing code");
return;
That seemed to resolve the issue for me.