UI Dialog r379 Buttons not showing inside of the dialog area

I am not sure when it started to happen but in one of my dialogs the
buttons are not showing up inside of the visible area when using the
modal option. It seems to be caused by the height 100% on the div.ui-
dialog-container. The height is set on line 45 or revision 379. When
I remove the 100% I get the behavior that I used to have.