If you think about all the items that go into a new home build, most people kind of forget about the glues, adhesives and caulks that are used during the build.  Caulking around doors and windows, adhesives under the sub flooring, glues for the cabinetry, etc.  While the amount of actual material doesn't add up to the volume of paint you would use, it can certainly make for harmful indoor air if the wrong products gets used.