Just a heads up.........
I've just had a virus warning on 2 seperate Yahoo mail accounts. One with an attachment of postcard.exe and one with a screensaver extension (.scr). Subject fields were "happy new year" and "good day" respectively. So, as per usual, be very careful about attachments, don't open the buggers. Maybe this is Yahoo specific accounts, as I haven't had problems with any other email accounts. At least Avast is doing it's job well.