That option is supposed to enable tabbing between widgets (at least), and is one of the main differences between creating a window and creating a dialog box. Without it, you generally _must_ use the mouse to select widgets.
Hummm - this sounds like a bug then. I've created a tracker item for it: http://sourceforge.net/tracker/index.php?func=detail&aid=1201190&group_id=16572&atid=116572There is another bug associated with -dialogui=1 - so this option needs a good going over:)
Cheers,jez.
