"AddressBookSourceSync" and iCal keeps asking for login keychain
So, every 30 minutes or so AddressBookSourceSync and iCal asks me for my login keychain password.
It is extermely annoying and I constantly have to type my login password.
Clicking 'Cancel' causes it to reappear immediately...
How to stop this?
Thanks
-James
MacBook Pro with Retina display, OS X Mavericks (10.9)