I don't know if this has already been mentioned, but if so, then consider this a "me too" :-)

Make it possible to duplicate a light even after it's been parented to a something in the scene (usually a point or spot light parented to a light-emitting prop). When the light is unpainted, I can use Edit>Duplicate to make a copy of it with no problems. But if the light has been parented, then what happens if I use Edit>Duplicate is that the entire parented item gets duplicated, not just the light. To get another copy of the light only, I have to first un-parent it, then duplicate it, then reparent it. Either that or scratch my head over why there are 12 lamps in roughly the same place in a room ;-)

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TOOLS: MacBook Pro; Poser Pro 11; Cheetah3D; Photoshop CC

FIGURES: S-16 (improved V4 by Karina), M4, K4, Mavka, Toons, and Nursoda's people

GOALS: Stylized and non-photorealistic renders in various fantasy styles