gnome panel seems to always catch it anyway. Core; is wrong here.
Changed files:
gnome-desktop-desktop.patch -> 1.1
--- /dev/null
+diff -ur gnome-desktop-2.10.0.orig/gnome-about/gnome-about.desktop.in.in gnome-desktop-2.10.0/gnome-about/gnome-about.desktop.in.in
+--- gnome-desktop-2.10.0.orig/gnome-about/gnome-about.desktop.in.in 2005-01-09 21:42:58.000000000 +0100
++++ gnome-desktop-2.10.0/gnome-about/gnome-about.desktop.in.in 2005-04-01 19:23:27.340762768 +0200
+@@ -7,7 +7,7 @@
+ Terminal=false
+ Type=Application
+ DocPath=
+-Categories=GNOME;Application;Core;
++Categories=GTK;GNOME;
+ X-GNOME-Bugzilla-Bugzilla=GNOME
+ X-GNOME-Bugzilla-Product=gnome-desktop
+ X-GNOME-Bugzilla-Component=gnome-about