Have you tried the steps that wizdomwheels with similar issues reported to work in this thread? Note: I know you stated that you don't sync Contacts to iCloud, so just skip the steps that don't pertain to you. Also, although that thread pertains to macOS 10.9, user GooglePerplexed followed those steps with macOS 10.10 with success.
Since you reported that the issue started after upgrading to Yosemite and having similar issues after creating a new user, you might consider validating and checking for duplicate fonts using Font Book.
One other thought is verifying your hard disk using Disk Utility (in Utilities folder) and while there, run Repair Disk Permissions.