Terry:
"The problem you are experiencing is due, once again, to WORDS and not the reality itself." -- OK, I grant you that there may be some semantics there. Therefore, we should consider what it is we mean. In your statement above, you refer to "reality itself". I think, from reading your entire comments, that you speak about an extrinsic reality, the one that exists whether we exist or not, the one that tells us the universe will still follow the laws of nature whether we're here or not. That reality is based on deduced principals (the laws of nature) which we have devised to explain our observations.
Based on those observations, we believed once that there was a luminiferous æther permeating the universe. Based on those observations, we decided that time was universal and absolute (Newtonian). Then we decided that time was relative (Einsteinian). Now, there's a new theory where time may contract but only locally (the revived Lorentzian) or that time does not exist all-together (the Julian Barbour premise). Those are serious conclusions (not yet full proofs) that explain reality in fundamentally different ways.
So what is reality? Is it that which we observe on a daily basis -- the sun comes out; the streets get wet when it rains; I feel pain and pleasure; if I get too drunk I'll vomit and have a hangover; etc. If we deny that what we observe or experience is filtered and manipulated by our senses and limitations, then we have no need to question what we see, hear or learn via our senses. We would accept and assume everything without question. We would then trust our feelings, imagination without question. There would be no differences of opinions.
On the other hand, it is the doubt of what we observe that has led many to question their own reality regarding what nature is and go beyond what the majority believes. So reality, in the most fundamental way, may be something other than what we can experience the way we cannot experience what matter really and truly is, because we can't really touch it or see it at its most basic nature.
We think it is atoms, composed of protons, electrons and neutrons, which in turn are made of quarks, which in turn are made of... Perhaps matter is not made up of atoms at all and is really made of one-dimensional strings that go in and out of several of a total of 11 physical dimensions. Perhaps matter is neither of those and instead is made of minute propagating waves that not only connect everything in the universe but do away with all the problems of Quantum Physics. http://www.youtube.com/watch?v=8BTcmuGdLCU
If we can conclude that a bolder in the middle of the road is one reality, it doesn't mean for example that my near-death experience, when I saw a light at the end of a tunnel and saw all my dead relatives on the other side awaiting for me full of immense love is also reality. Think about all the little things in between the bolder on the road and vision of heaven that can vary in perception from person to person. Yes, there is a reality. But I think that while we can identify and agree on some if it, there are slightly different versions of it due to our individual perspective and also to our physical and sensory limitations.
" The way physicists locate a quantum partical explains why the path is changed in the process of observation." That may be. But the classical quantum conundrum is that if you locate it, you cannot know its weight, charge or anything much else about it. If you know its weight or charge or spin, you will have no idea where it is. That is the Heisenberg Principle. It's like trying to figure out what a snow flake is like by touching it. The very act of finding out via your touch prevents you from ever knowing its makeup. The snow flake is real. But, your idea of what it really is (but for our other senses) will remain elusive.
That's how sometimes reality is to us. Our bolder in the middle of the road could be made from card board and happened to have fallen from a truck headed to a movie set. What is reality? Reality is a bolder. Is it? When you stop to examine it using other ways (not your sight because it looks just like many other boulders; not your smell, because boulders generally don't have odors; etc), you may find that it's not made up of cardboard but of synthetic foam. If you could look at it not in person but from a video, you might be able to tell that vegetation is crushed leading up to the bolder (telling you it come from somewhere else). Maybe that might indicate that it's real and not foam. But if someone else just drove past it, his reality of the boulder would be different from your reality tested by careful examination and verification.
" The 'two places at once' strangeness is a result of how location is measured in the first place ." -- Not quite. The discovery has led some to suggest "faster-than-light" communication and the possibility of instant tele-transportation. What you suggest is that the method of measurement yields two different location. OK. If the methods are correct, then there ARE two different location each with the entity being measured. This is also related to the Heisenberg Principle since any number of measurements of a particle can yield multiple locations.