[ODE] Syncing ODE over a Network (client side prediction)

[Dave Kerr]

Hi, I'm building a multiplayer game engine and am trying to sync ODE objects 
over a network.
All is fine if I sync static objects...
But with moving objects, the clients and server usually end up out of sync.
Ie the simulations rarely run the same course.

I was wondering if this is part of ODE (random numbers)?
Or am I missing some variables to sync:

When a client connects, they get Position, Linear Velocity, Angular 
Velocity, Mass, Density, Size/shape and the Quaternion
to 12 decimal places, of every body.
It works if all objects are resting (or at least looks like its working), 
but once a moving object is added, the simulations take different paths.
How many decimal places is necessary?
Am I missing some data?

I would like to minimize the network traffic by trusting the clients to 
correctly predict most of the ODE physics.

Any thoughts on this subject would be appreciated.

cheers,
Dave