The option to disable the anti-virus is missing from the a/v tab in the admin gui, is this intentional? I think I prefer to have the ability to disable it for testing so that I can check there's nothing 'interfering' with incoming mail if I have any problems.
Did you try to disable A/V by unchecking it from the services tab on each server?
Sorry, that was a slightly hasty post. :o What I meant was that it's still on each server setting but only missing from the Global setting in the Admin GUI - was that intentional. Yes, it still gets disabled on each server if you uncheck that.