I am a Game Studio user. And I think GS physics engine is based on ODE. Newton has been ported to GS and I have gotten much better luck with Newton than with ODE.
I think the problem you may have is probably the time step being too long, or your boxes moving too fast.
I am starting to experiment IrrLicht and Mercior's turioal and demo looks good to me.
I have not seeing another demo like that with Tokamak or ODE
I am still open to evaluation; can you point at some demo using ODE or Tomakak that I can evaluate?
Hey on the bright side now we have more than one physics solution to choose from, I think we are the real winner now.
roberto