I'm beginning to think (to fear) that the source of the recurrent infection is somewhere within LJ. After all, this is where I mostly spend my time. Ailz- who doesn't visit LJ very much- says the only time she's had a malware attack was after answering a comment on LJ. The evidence isn't strong enough to lead to a conviction, but it's persuasive.
"Bah" is all I can say."Bah!"