Layer 7 - Error when deleting L7 rules group

[Slam]

Im testing out layer 7 blocking on pfSense-Full-Update-2.0-BETA1-20100421-2213.

If I create a layer 7 rules group and then deciede to delete it later on, I get the following error message in my logs

Apr 22 14:40:55 php: /firewall_shaper_layer7.php: The command '/bin/kill ' returned exit code '1', the output was 'usage: kill [-s signal_name] pid … kill -l [exit_status] kill -signal_name pid … kill -signal_number pid ...'

To reproduce:
WebGUI - firewall > traffic shapper > layer 7

Create new l7 rules group, "Enable layer7 Container" ticked, add a "name" for the group, Ive left "description" blank, add at least one protocol > structure - action > behaviour - block, save and then apply

Now delete the l7 rule and the above error will show in system logs

I have opened a ticket for this http://redmine.pfsense.org/issues/show/535

Thanks

Slam