Bummer... the leak bit, not the Brazilian bit... :lol:
I've only ever caused leaks in the flat below, never been on the receiving end, but it's a nightmare all round - especially when it's someone else's fault (ie neither the leaker nor the leakee are actually responsible or even know how to fix it... downstairs gets damp on a wall - it could from our kitchen or our bathroom, or even from the roof, but our landlord has paid cowboys to tw@t about with it a few times, but no-one's ever been entirely sure it's fixed... we and her downstairs know it's not... :roll:)
Hope it gets sorted easily/fast at your place...