[Subligaria]

I'm using Word 2007.

Can anyone suggest why applying the "Page break before" feature in the
Paragraph dialog to successive headings should result in some pages with a
bigger gap before the head than others?

In every case, each head has a "spacing before" value of 12 pt (both in the
underlying style and in terms of manual formatting). In some headings,
however, there is a perceptibly bigger gap . . .