Nice example of what I was talking about.
One question, is your dimension precision normally set to display 256s of an inch?
Yes, our precision is always set to 1/256. Why? you may ask. Well, "Can't you see that small on paper?". No really the reason we have it set that low is because we dimension in actual dimensions instead of nominal dimensions. We only show dims on our sheets to an 1/8" of an inch, but we have long strands of dimensions, like 30 dims in 400 feet, and those small "rounding errors" by AUTOCAD add up over the length of the building so to make it fool proof we set our precision very low. That way when a user "accidentally" picks the wrong point and they get a low fraction it jumps out at them and says, "Hmm, This has got to be wrong. Let me fix it." Just our little way of quality control.