One more thing: The client has purchased a few larger monitors since the first build of their database was delivered. Their people do move around a lot, so it is entirely possible that they may use the database on both size monitors and notice a difference in the layout size. It looks sloppy and I'd rather not have them see it like this.
Okay, I solved this one myself. I have a tab control on the bottom of the layout. The tab control is not set to expand vertically, but one of the fields on one of the tabs was.Though neither the field nor the tab control stretched to the bottom, FMP expanded the body to accomodate them.