Outdated Vulnerability SIGs?

A new Vulnerability Protection engine and new Vulnerability SIGs were delivered by Live Update last night.  Running Live Update again says that everything is now up to date.

 

But if you go into Norton Antivirus and then go to "Configure" Vulnerability Protection to see the list of vulnerabilities, the note at the bottom of the list says the signatures are dated 2/23/10.

 

Is this correct?  Isn't that the date of the SIGs the old engine used?

 

This is on a PowerPC G4 laptop running 10.5.8.

 

There are no relevant error messages in the Console.

--Bob