Use larger buttons, looks better and slightly improve usability (IMHO)

themes/default/close-active.png

themes/default/close-active.xpm

themes/default/close-inactive.png

themes/default/close-inactive.xpm

themes/default/close-pressed.png

themes/default/close-pressed.xpm

themes/default/hide-active.png

themes/default/hide-active.xpm

themes/default/hide-inactive.png

themes/default/hide-inactive.xpm

themes/default/hide-pressed.png

themes/default/hide-pressed.xpm

themes/default/maximize-active.png

themes/default/maximize-active.xpm

themes/default/maximize-inactive.png

themes/default/maximize-inactive.xpm

themes/default/maximize-pressed.png

themes/default/maximize-pressed.xpm

themes/default/maximize-toggled-active.png

themes/default/maximize-toggled-active.xpm