It's interesting to hear that the light falls out of position for so many people, given that mine is solid as a rock (sometimes it takes two hands to even move it). It makes me suspect that they changed the "arm" to one that is far less stiff than mine. Or maybe I just got one that is extra stiff.
My only complaint is with the lightbulbs that are used. I don't like the "yellow" light from traditional style bulbs, and I do not like the large amount of heat generated by them, either. An LED bulb would solve both of those problems, but I haven't been able to locate one so far.