After having successfully rigged a new character/clothing based on a V4 donor rig, I find that when I load both V4 and the new item (ivy branches) that when I conform the branches to the V4 figure, the legs and below 'jump out' from being conformed. Its always the same amount, no matter the pose. I can manually reset the dials to zero and it conforms very well, but what causes the parameter dial to change like that? 

And here's the final effect:

...Insert some witty or thought provoking comment here...