Armature Panel - "Vertex Groups" - "Envelope" Bones Panel - "Mult" The logic works as follows; - Set "Vertex Groups" will enable vertex group based deform (default) - Set "Envelope" will enable Bone Envelopes to deform - Set both will apply Envelope deform on vertices without VertexGroups - Set the per-Bone "Mult" option to have Envelopes work on top of a VertexGroup - The per-Bone "Deform" option (was called "Skinnable") will dis/enable the Bone to deform for all situations. The old convention was that, without any vertex groups, the Bones deformed with bone-distances. I can't patch that... so you have to enable it by hand in older files. Not too bad, since this option was unusable before anyway. :)