[ODE] Objects getting stuck with tri-mesh

[Flavien Brebion]

I've finally found WHY i get some objects
stuck into my scene.

It's actually very easy to understand. Check this
figure:

http://www.fl-tw.com/LightSpeed/stuck.jpg

If the object falls "quickly" on a pretty thin
box (or any actual thin solid, represented as a
tri-mesh), there will be reports of contact
points both on the upper and under sides of the
box -> contact forces cancel each other (or
almost) and the object gets stuck inside the
box.

Now the question: what's a robust way to fix it?

F. Brebion