UI Dialog Overlay re-draw

UI Dialog Overlay re-draw

Using  UI 1.8.2, I am adding content to a dialog after it is rendered (validation messages). When the content is added the overlay's sizing is getting distorted and unnecessary scroll bars are appearing on the window. I was wondering if there was a method I could call that would redraw or re-size the overlay (similar to what occurs when you drag a dialog)?

Thanks

josh