[ODE] Cylinder collisions?

[Morgan McGuire]

I built yesterday's UNSTABLE CVS on Win32 with colisions, single precision, and
trimesh.

I replaced a ccylinder (capsule) with a cylinder and dropped it onto a ground
plane, slowly, at 45-degrees to the horizontal.  The cylinder passes right
through the plane with no collision detected.    If I put back the ccylinder it
hits the plane as expected.

What's going on here?

-m