Attached Link: V4 too-high underarm cut -- Morph Fix -- Beta Testers Needed [DAZ forum]

Ok, I found it anyway, for the benefit of anyone who may be wondering.

Quote - Poser7's morph tool creates the morph as the last entry in the list for a particular bodypart, before the joint rotations instead of after as morphs usually are... making it useless.

Why? Because morphs that are created on the mesh before the joints break at the seams, and result in shapes wildly different from whats needed as a standard morph made after the joints.