the error I had was :
Error #1023: Stack overflow occurred.
at away3d.core.base::Vertex/get position()
at away3d.core.base::VertexClassification/getDistance()
at away3d.core.clip::NearfieldClipping/checkFace()
at away3d.core.clip::NearfieldClipping/checkFace()
etc...
with view.clipping = new NearfieldClipping();
view.clipping.rect(0,0,SW,SH);
view.clipping.objectCulling = true;
during Camera rotations, sometimes, but I failed finding the
parameters and the logic of the bug...
Now if Peter can solves both... ;-)