I installed the new update this morning so I am running build JZO54K.N8013UEUCMC2 of 4.1.2. As I started using my tablet this evening I noticed that it had developed a bad lag. I first noticed that animations in games that used to be smooth now stutter. As I experimented with the tablet I found that it is lagging on page transitions and typing, as well. What used to be smooth as butter is now jerky as beef. I checked the Task Manager and had only one active application (Angry Birds Space HD), and the RAM manager was at .88GB/1.78GM; nothing out of the ordinary. Then I checked the battery. The largest drain is typically the screen, by a large margin, followed by Android System. Now it is Exchange Services (35%), followed by Screen (24%) and Android System (18%). I didn't change any settings so I don't know why Exchange Services is suddenly so active. Anybody else having this problem? How do I remedy it?