Anyone else having the new type cover keyboard on their SP4 stop working? Had this problem, a lot, on my SP3 and now it happened for the first time (had my SP4 since Monday and this is the first occurrence). The keyboard simply stops doing anything (no typing, no caps lock toggle, etc.) and a disconnect/reconnect will make it work, again. Really frustrated by this. Had this problem several times a week with my SP3 and was hoping it was solved with the SP4 and new covers. It's not. And, yes, I've talked with Microsoft about this numerous times, done the full power off reset, updated drivers, etc. Often, it seemed to fix things, but the problem always came back and one back, would fail every few days (at least).