Critical Warning Detected unexpected data in protocol

Hi.
Windows XP Machine.
Using latest Smart Security 4.X
It has two Vlans.
On one Vlan it is reporting this...
LEVEL : Critical Warning
EVENT: Detected unexpected data in protocol
Source: It shows 5 ip addresses in the same Vlan (each IP on it's own line)
Target: it shows the same X.X.255.255 where X is the Vlan.
Protocol: UDP

I have added these IP's to the trusted Zones and it still reports the Critical Warning.

Is there anything else I can try.
I understand that the problem could be something on that network broadcasting somethign via udp.. how do I get it to NOT report the Critical error?

 

Hello,

To determine what part of the payload is generating this error, an examination of a packet capture is probably required. Please contact ESET Customer Care for assistance.

You can capture the flagged packets by following the instructions in ESET knowledgebase article:

How to activate special logging of the Personal firewall
http://kb.eset.com/esetkb/index?page=content&id=SOLN742