A whole new default icon theme has been created for 2.4. The icons comply with the Tango style guidelines so GIMP doesn't feel out of place on any of the supported platforms. Regardless of whether you run GIMP under Microsoft Windows, Mac OS X or Linux (GNOME, KDE or Xfce), GIMP provides a polished, consistent look.
Additionally the icons also have enhanced usability on dark widget themes, which is a common setting among digital artists.
For artists preferring more desaturated color theme for their icons, an alternative icon theme is available for download.