reload icons from /usr/share/icons/gnome/48x48/apps/ after installation of app

[Christopher Lang <christopher lang acurana de>]

Hi,

the installation of the app that I am developping is placing a set of icons 
in /usr/share/icons/gnome/48x48/apps/ (also in 16x16, 32x32...).

The postinst script puts a .desktop file on the user's Desktop, which calls 
for one of these icons. (I know that putting stuff on the desktop is not 
perfect behaviour...)
...
Icon=some-icon.png
...

After the installation is finished, there is my new Desktop file visible on 
the Desktop, but with a placeholder icon. Only after logging out and in  
again the nice icon that I placed in ...48x48 is shown.


How can I tell Gnome Desktop to reload icons 
from /usr/share/icons/gnome/48x48/apps/ (or from ...16x16 etc.) so that the 
icon referenced in the .desktop file gets shown without the need of logging 
out and in again?

I am using Debian Etch.

many thanks
cheers
Chris

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