According to the Qantas engineering manager, Airbus have said that their was "no safety of flight risk and that critical systems of the aircraft are protected from issues such as water, heat and mechanical damage". (Of course, things might be lost in translation from French to English)
I wonder if the passengers have similar safeguards :P (QF engineers don't. One suffered an electric shock working on a toilet this week)
Boeing also did risk analyses on the 744. VH-OJM proved Murphy's Law yet again. We treat manufacturers' claims with a little more respect than spin doctors, but still....
I won't be installing a light switch in my shower recess, even if I have a protective circuit in my fusebox.