Hi All
i had the like issue, with SpamFIghter, and AVAST antivirus,
but i isolatet the issue
to when i installed and updated Internet Explorer (that the one program, displaying the previewpane)
end in Internet Explorer we got some extra tools Phising filter, automatic, try to disable it,
and im sure You Avats and Spamfighter will work perfect again.
Cheers Jonas,
SideWare.dk