Arduino DUE: strange I2C values..!?

Hey guys,

Finally i got my 9DOF sensor stick running (SparkFun 9 Degrees of Freedom - Sensor Stick - SEN-10724 - SparkFun Electronics). Now i had to replace my UNO with a DUE.
i wonder why my values from my 9DOF sensor stick are so different to the ones i get from the Arduino UNO or MICRO.
wire connection was the same both times: GND-GND // 3.3V-VCC // SLC-SLC // SDA-SDA

This is what the raw and unedited sensor output shows on the UNO & Micro:
(Accelerometer, Magnetometer, Gyroscope)

And this is what exactly the same code shows on the Arduino DUE:

anyone know this kind of problem? what's the matter with all therse 65000-Values?
Thanks a lot guys...

My first idea is, that the DUE has a different reference voltage for A/D conversion.