If you made a selection and didn't exit sub object mode before going back up the stack, it will screw up your skin/physique modifier. I'm not sure if skin or physique has a "ignore stack selection" check box or not. If it doesn't just go back down to edit poly and either select everything or close it out properly. Also if…
don't forget to release the buttons after edit the mesh (vertex, edge, border, polygon, element) before to select the skin modifier again. (sorry for the bad English)
I've finished my rigging using bones for my char. then i just realised that there's something wrong with my poly model, so i go back to editable poly modifier & fix it. But, when i try to move my bones the obj won't follow, i check the envelope & vertex weight < all is corret. but still the obj not moving when i move the…