Fix the Automator action. The “in bundle with identifier” parameter doesn't exist on my 10.5.5 machine (for some reason, even though the AppleScript Studio Release Notes claim it has since Tiger), which breaks compilation of the action's main script. We don't call the function that uses that phantom parameter, anyway, so I fixed the problem by simply axing the function.
4 on run {input_items, parameters}
5 set the output_items to {}
6 set the notification_title to (|notificationTitle| of parameters) as string
7 set the notification_description to (|notificationDescription| of parameters) as string
8 set the notification_priority to (priority of parameters) as integer
9 set the notification_sticky to (sticky of parameters) as boolean
10 tell application "GrowlHelperApp"
11 register as application "Automator" all notifications {"Automator notification"} default notifications {"Automator notification"}
12 notify with name "Automator notification" title notification_title description notification_description application name "Automator" sticky notification_sticky priority notification_priority