Vista - Strange security audit events

I have lots of the following messages in Windows Event Log:

Log Name: Security
Source: Microsoft-Windows-Security-Auditing
Date: 10/13/06 09:38:00
Event ID: 5032
Task Category: Other System Events
Level: Information
Keywords: Audit Failure
User: N/A
Computer: dd-X60s
Description:
Windows Firewall was unable to notify the user that it blocked an
application from accepting incoming connections on the network.

Error Code: 2
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-Security-Auditing"
Guid="{54849625-5478-4994-a5ba-3e3b0328c30d}" />
<EventID>5032</EventID>
<Version>0</Version>
<Level>0</Level>
<Task>12292</Task>
<Opcode>0</Opcode>
<Keywords>0x8010000000000000</Keywords>
<TimeCreated SystemTime="2006-10-13T07:38:00.946Z" />
<EventRecordID>1603</EventRecordID>
<Correlation />
<Execution ProcessID="668" ThreadID="1056" />
<Channel>Security</Channel>
<Computer>dd-X60s</Computer>
<Security />
</System>
<EventData>
<Data Name="ErrorCode">2</Data>
</EventData>
</Event>