A little patch has been added to granular pizza.py - the current version available for download is now gran_pizza_17Aug10.
Automatic unscaling for the dump command was removed as it turned out that this is not convenient for granular simulations, especially for scripting.
BACKWARD COMPATIBILITY:
If you have scripts that worked with former version of pizza.py, you should remove all commands like "d.scale()" from these scripts if their purpose was to undo automatic unscaling