QuakeMarine1: Sorry about this, the popups were historically hardcoded. I've recently changed it so it first checks if 3dsmax is in a quiet mode. There should be no non-UI-action-generated popups when network rendering in the daily builds and next stable build (due at/shortly after the EUE)
others (deleted posts): Do not be dicks about this, I would like to see your reactions if you sent a project with a tight deadline to a farm and did not get the result.