[ODE] very close contact points

[gl]

> You may get jitter, you may get stability/explosion problems, and it
> will have a bit of performance impact (because you do more work than > 
> necessary).

Speaking of contact filtering, a while ago Russ was asking for donations to 
work on exactly that.  I guess he never got many donations (though a little 
one from me) because I never heard anything else about it?

Does anybody have a system they'd be willing to contribute?
--
gl