Virus Def files

NAV2008

Vista Home Premium

Vista Service Pack 1

 

I Received virus def update yesterday. But when I go and look at the files

 

C:\ProgramData\Symantec\Definitions\VirusDefs\20090324.023

 

several of the items have a date modified of 1/1/2098

example

CCERASER.DLL

ERASER.SYS

NAVENG.SYS

NAVENG32.DLL

NAVEX32A.DLL

 there are about 22 of the 46 files in that folder with this future modification date

 

Now all of them do have a creation date of 3/24/09 9:38pm  which I believe was the time that my live update ran and installed the update

 

All of the items in the examples above have a digital signature from Symantec Corporation

 

Why the 2098 modification date? Anyone else who received defs last night experience the same thing?