In the title bar of twhirl, all of the text can be clicked on and highlighted. This makes it more cumbersome to drag the window around. Is there any chance you could make the text in the title bar unselectable so it is easier to drag the window around?
Perhaps if you set selectable="false" in the Text components in the TitleBar. Not sure if that would actually allow you to drag the twhirl window around while "sent x req/60 min" text.