When Installing Growl 1.1.2 (same problem with previous versions) on Leopard,
you can't choose to install Growl just for your user.
1 Issue)
When selecting the dialog to choose the target volume in the installer, the installer is locked (circular coursor / beachball) for about a minute.
2)
When the dialog is finally opened, the user is able to select "just for my user", but the continue button is greyed out.
(i am running filevault - not sure if this happens with deactivated filevault, too - at least with 10.4 it worked with filevault)