Looks like it could be a scale issue. A lot of material room nodes base their scale on the scale of the item to which they are applied. When an object is parented, it picks up scale information from the parent, so you may have a material node that is using the woman's scale while the ball is parented, then switching to ball scale when the parenting is turned off. Just a guess, but it's the first thing that comes to mind.

View Ajax's Gallery - View Ajax's Freestuff - View Ajax's Store - Send Ajax a message