Comment 3 for bug 1049957

IMHO, expose should have the same behavior that window-switcher and Plank (which acknowledge these dialogs) have today. You'll see in the video above that both window-switcher and Plank handle those settings windows just fine. I didn't record the handling of "about dialog", but I have verified that they're skipped/hidden as expected. We wouldn't want modal dialogs displayed if the parent window is visible.