I'm getting the error "android.process.acore has stopped" constantly, which makes my phone impossible to use. I have cm-10.2.0 on a galaxy S3. I have already tried factory reset and re-flashing the ROM several times. Any more ideas or is my phone now a brick?
Is it possible that google restores faulty contacts each time you did a factory reset? deactivate google sync for contacts and delete data for contacts and contact storage. This will delete all your contacts so make a backup!
(sorry I meant to write this in the comments section... now I don't know how to delete this.)