Old IPSDefs not being automatically removed

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1

I know this was a problem in the past (1) but it seems it's still happening.

 

I have

 

20100917.001

20100920.001

20100922.001

 

in my IPSDefs folder.

 

And I have received new definitions and rebooted in between, which should purge the old ones, but they are still there.

 

NIS 2011, Windows 7 x64.

 

1. http://community.norton.com/t5/Norton-Internet-Security-Norton/Old-IPSDefs-aren-t-being-deleted/m-p/58545/highlight/true

 

http://community.norton.com/t5/Norton-Internet-Security-Norton/IPSDefs-folder-has-a-bunch-of-old-definitions-in-it/m-p/98083