6DOF (DFR0209 v1.2) with Arduino Due?

Is anyone using the 6DOF v1.2 shield on a 3.3V Arduino? If so, how are they doing the level-shifting for the I2C link?

I'd answer the question myself, except that the v1.2 schematics aren't on DFRobot's website (they have only the v1.1). :-)

b.g.