Update: I just plugged the S4i set into my Zune and both problems were not present. No shocks. And I didn't have any connection issue where the input didn't make contact and I had to finagle it. When I plug them into the front jack on my PC I get the shocks and the connection problems. When I use a 3.5mm headphone extension cable I have the same connection issue when plugging into that. Thing is, using my Skullcandy set I have no issues like this. When I use my Audio Technica AD700s I have no issue. I did have this same issue with an old generic set I use to use. So, why this problem with some sets but not others? I love the S4i sound and want to keep them but this sucks. [:@]