Many of the initial assembled r0 prototypes had shorts on I2C bus:
We believe this is because of bad footprint for U5 (the 9DoF). I removed U5 from my prototype and the bus is no longer shorted.
I have ordered new 2x2 panel from OSH Park and new stencil from OSH Stencils. SparkFun should have by the end of the week.
The commit version that was ordered is:
84d48e1