Locating Virus Def update files

I use NAV2008 on a Vista Home Premium with Vista Service pack1.    I’m trying to see if I have the folders showing the virus and other def updates. (not talking about the other issue I had with IWP sigs, I’m talking the daily updates)  I go to this path 

C:\ProgramData\Symantec\Definitions\VirusDefs

  In that folder I find a folder labeled

20090107.32   which would be up to date defs (when I checked yesterday)

 

  However, I find no folders starting with 2008, just a few 2007.

Shouldn’t I have folders showing some dates in 2008?  I mean it goes 2007 right to 1/6/09 and 1/7/09 nothing in between So maybe I’m not looking in the right spot? Any Vista users notice this too?