For testing purposes I clicked on one of the system rules firing every few minutes (I haven't started tuning yet) and on the resulting "Inspection Rules" page clicked on "Action None" to set the rule to mail me when firing. I selected an active recipient, submitted my change and clicked Activate.
After that all incidents match the rule "System Rule: Network Errors - Likely Routing Related-Aug 8, 2007 5:19:25 PM CEST" instead of the rule I changed the action on. Also this new rule cannot be found among the other inspection rules and the rule reference cannot be clicked on the dashboard either.
This seems rather bad, my guess was that I would be able to edit the system rules without problems. Whats wrong?