I waited to upgrade all my iDevices to iOS 8 until iOS 8.1 was released. I was planning to wait even longer, but wanted to be able to JB with Pangu. NOTE: I have not JB'n yet. I've noticed, over the past few days, that my iPad "4" often stalls and/or displays a message about low memory. A quick glance at Activity Monitor has shown, in every case, that nearly all RAM is used up. Anyone else experience this or similar?