I have noticed a change for both IE 6 and Firefox 3.0.18 in the dialog window height if the ContentUrl is set. With build 53 (and 57) my dialogs appear correctly. Since build 72 they open showing the title bar and only a 1/8" of window in IE6, the title bar and about two inches of window height in FireFox. I can cycle the behavior from normal to defect by re-compiling my project with the different EO builds. No other change occurs in my code.