Update from my end, my stylus started writing intermittently even when fully charged. After carefully removing the tip I could see that the tip was cracked almost all the way through near the slightly thicker area. IMO there's no way that should be happening, given that the tip basically can't move left-right, and so it shouldn't be bending, even when you drop it.
I started a thread about this on the Sony forums a couple days back, but haven't heard anything, see here
http://community.sony.com/t5/Reader-...tip/m-p/651607
In the meantime, has anyone found another compatible pen, or tried a warranty repair on a stuck broken tip? I don't want to end up spending $100 because a flimsy $0.01 piece of plastic snapped off..