So I started having a weird issue on my 13, where when I pressed the number 4 key, Launchpad would open up. When I pressed the F4 key, Launchpad would flash quickly about 2 or 3 time, and sometimes it would stay open. then, even just lightly touching the F4 key would open Launchpad. I thought it was a hardware problem, but I went thru the usual tests and diagnostics (even created another profile to make sure it was hardware related). Took it in to the Apple Store today, and they confirmed everything, but of course, they didn't have a 13 with 16GB in stock, so I had them ship it to their repair center.