I need some help please. I am new to Apple and am running a MacBook Pro. In my contacts I am getting an error message next to my main contacts list on the left hand side of the contacts box and it says... Operation couldn't be completed. (CoreDAVErrorDomain error1). Can anyone tell me why and how I fix this? Also, when I add a group, it disappears when I next want to use it, what am I doing wrong? Any help would be gratefully received.