diff -p -up ./gnofract4d.desktop.orig ./gnofract4d.desktop
--- ./gnofract4d.desktop.orig	2010-11-07 21:47:30.000000000 +0100
+++ ./gnofract4d.desktop	2010-11-07 21:48:55.000000000 +0100
@@ -4,10 +4,10 @@ Encoding=UTF-8
 Name=Gnofract 4D Fractal Generator
 Comment=Generate fractal images such as the Mandelbrot set
 Exec=gnofract4d %F
-Icon=gnofract4d-logo.png
+Icon=gnofract4d-logo
 Terminal=false
 Type=Application
-Categories=GNOME;Graphics;Math;
-MimeType=text/x-gnofract4d-fractal-parameters
+Categories=GNOME;GTK;Graphics;Math;Science;
+MimeType=text/x-gnofract4d-fractal-parameters;