erratic touchpad
Starting a few month ago I could no longer touch type because the cursor would skip several lines elsewhere on the page as I typed and new typing would continue in the middle of a word above my current typing site. Genius bar had no suggestion for a fix. Touchpad seems defective on my Oct 2013 MarPro retina 13".
MacBook Pro (Retina, 13-inch, Late 2013), iOS 8.1.3, Touchpad prob 6 mo post purchase