2.1.1639 Part 4 Section 18.104.22.168, ST_PictureStackUnit (Picture Stack Unit)
a. The standard states that the ST_PictureStackUnit simple type has a minimum value of greater than 0.
Office defines this simple type to have a minimum value of greater than or equal to 0.
This note applies to the following products: 2007, 2007 SP1, 2007 SP2.