It's back to normal, but it was behaving pretty weirdly for a few days over xmas. I have some software that tracks the position of all my apps in all the charts around the world, and for 4-5 days they *almost* stopped moving. Some of them seemed to flatline, others seemed to move just a little and then stop, and others seemed to jump between 2 numbers - like either 150 or 130, switching places every few hours. Very odd.