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That is strange, sounds like it is not done right or it has limitations attached to it. Make sure "Use poser limits" is turned off. Some times people set object parts to min and max = 100% so scaling can't happen with limits turned on. I don't think they do it on purpose, I have also gotten things that have it se to you l can not rotate a figure left or right if limits are turned on. I always work with limits active so I notice right away if i have done this to something I am working on.