I just moved to Peru with my 15" MBP and after 3 days without incident, I now get mildly shocked by the edges of the laptop when plugged into wall power. I understand I am experiencing a grounding issue. Peru uses the Type C plug so, by design, the juice from the wall is not grounded. Thus, the MagSafe power adapter with 3-prong head is rendered ungroundable by the wall receptacle. Does anyone have any ideas? Short of solutions, does anyone know if this is bad for the longevity of the hardware? Interesting aside, another symptom I experience is a distinct yet slight vibration (?) sensation when performing a 2-finger gesture motion on any flat solid surface of the laptop that is NOT the trackpad. Vibration may be a poor word choice...it's like I'm trying to run my fingers over a surface that is sticky or has some resistance to it. Disconnect the AC and both the shocking and the motion vibration sensations disappear. Weird.