Binary ragdoll demo sometimes acts funny

I am trying the ragdoll demo (the binary version).
Some times the mesh triangles seems are going to explodes even if the debug objects shows the physics is quite stable.
Once in a while certain mesh are shown gigantic an distorted
Does anyone know a possible reason?
I did a opal/ode physics library interacting with ogre and was having a similar problem: I thought it was my fault but now I am starting to believe that there is something more behind.

i have noticed it, maybe it has something to do with scaling, it gets much stronger when you rescale the mesh. unfortunately i did not manage to fix this yet.