insta-crash when forces/particles removed with collision

I am using Particle Tools v0.2 on Mac OS 10.5.5, QC v.3.0.

I have a little system where an emitter is emitting more emitters which emit particles. I checked the particle count and that's not what's causing the crash, btw. There are a few forces, a couple of winds, or a wind and a vortex.

I also have a collider with a face structure that I ganked wholesale from smokris' "hose" composition.

Then, if I remove a force and/or the particle while the viewer is running, it crashes. Usually if I delete the patch outright it crashes right away, whereas if I disconnect it, it crashes the next time I hit stop on the viewer.

So, summary. Three observed conditions:

1. # of objects in scene ≥4
2. ≥2 forces
3. Collider with smokris' faces structure

Several possible actions:

1. Delete particle while viewer is running
2. Remove ≥1 object (sometimes it survives one but crashes on the second time) while viewer is running, then stop viewer.

ALL of the conditions + EITHER of the actions = INSTANT crash.

The End.