Just to let everyone know, deleting the CenterOfMass prop using the Hierarchy Editor is a bad idea.

I opened a scene file where the clothing figures have multiple CenterOfMass props: the dress has 4 of these props, each of the two shoes has 3 props each, the human figure has 3 props, and so on.
I have the feeling the props are re-created every time the scene file is opened and saved.
(As an aside, why do shoes and other conforming clothing even need 4 CenterOfMass props attached to them?)

I opened the Hierarchy Editor, selected a CenterOfMass prop and hit the Delete key.
Poser gave me the usual "Are you sure you want to delete this figure?" message. I clicked OK, then Poser asked again. I clicked OK again and Poser removed the figure from the scene.

Then, the mouse pointer disappeared completely. The mouse still moved the pointer, but the pointer wouldn't appear anywhere over Poser.
I managed to go to File > Revert, but when I tried to click the Revert button, nothing happened. I couldn't even move to the Cancel button.
I had to force-quit Poser using the Task Manager and restart it.

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