hi doc.
my experience is this.
I work with a powerbook G4 with norton antivirus installed but I can only use limewire if I disconnect "autoprotezione" ( I don't know in english may be "self protection" ).
with "autoprotezione" activated it ever breeze my mac during downloadig and more ofthen during "saving file" .
I make so: I download files and after doing it I scan them wit norton antivirus from the share folder.
Hoping I' ve been helpfull I bay you.

corrado.