If I create a 2d object, a square, for example, the object info box has all sorts of useful information such as the dimensions and the coordinates of the insertion point (changeable to be the corners, center, etc).
If I extrude the object, most of that information disappears. It still has the size information, but everything else goes away. Particularly annoying is the loss of the insertion point. It's as though the object is now just floating around on my drawing and I have no way to put it in a precise location.
Why does this happen?