Outlook 2003 Junk Mail Filter Update

Updates to the junk mail filter often result in more junk being delivered
than prior to the update.  Happened again this week. I am not deleting
obvious junk manually.  In the past,  problem usually corrects itself with
the next junk mail filter update.  In the mean time its a problem.   Anyone
else experience this problem or know how I might solve it? Thank you.

Outlook-specific newsgroups include:microsoft.public.outlook.generalmicrosoft.

Outlook-specific newsgroups include:

microsoft.public.outlook.general
microsoft.public.outlook.bcm
microsoft.public.outlook.bcm.developers
microsoft.public.outlook.calendaring
microsoft.public.outlook.contacts
microsoft.public.outlook.fax
microsoft.public.outlook.installation
microsoft.public.outlook.interop
microsoft.public.outlook.printing
microsoft.public.outlook.program_addins
microsoft.public.outlook.program_forms
microsoft.public.outlook.program_vba
microsoft.public.outlook.teamfolders
microsoft.public.outlook.thirdpartyutil