In Poser10, dynamic cloth simulations don't obey the settings for collision objects.  Example: a forearm brushes against a hip and it grabs the dynamic cloth of a pair of shorts parented to the hip even though forearm is not one of the collision objects for the shorts.  The dynamic cloth simulation then blows up.  Seems to happen when I've already run a bullet physics simulation on the figure, though I haven't tested the simulation without a bullet physics run.  Cloth sim fails even if prior bullet physics simulation is cleared. 

 

This is a major disappointment since I would like to be able to run a bullet simulation of a figure's body then run dynamic cloth sims for clothing.