A little while ago I was typing a text message and noticed that the keyboard response was sluggish, and I had to keep re-hitting keys. It was a far cry from the silky smooth response I had at first. Of course my first thought was a rogue app, so shut down a bunch of stuff running, but still sluggish. I unplugged it to look at something closer and suddenly everything was smooth again. At first I assumed that was coincidence, but the moment I plugged it back in the sluggishness returned. I unplugged again, and once more it was smooth as could be. HOWEVER, a couple minutes ago before posting I plugged it in again and it seems just as responsive, no slowdown. So, I'm a bit puzzled. It really seemed correlated to plugging in / unplugging, but now it's fine. Any thoughts? Anyone else see something like this?