You've probably done this but if not try dragging a bounding box around just the character, getting as close to it as possible, then cutting the character object, creating a new file and pasting it in there to see if anythings changed.
Just for some general information try getting the z size of your object in DBP using the OBJECT SIZE Z command, Im wondering if the "phantom object" is being included in properties like this (I.e the object's z size will be very large if it is). If the object isnt being included in things like this than you shouldnt have a problem.
One last idea would be to create a sphere and position it at each of the characters limbs positions, once you get the limb to be positioned at the phtantom box limb you'll know which limb number the box limb is, and can then just use DELETE LIMB to delete the phantom box object.
Ill try downloading the file now, could you possibly submit your .3DS file instead of the .x, so I can see if its possibly Panda adding this limb when the conversion takes place?
