Biggest quick-downpour here that I can ever remember. Was driving when the worst of it hit, wipers couldn't go any faster and we still couldn't see so were only doing 40km/h.
When I got home, I couldn't *not* go out in the rain to see how the neighbourhood was faring. Kept my camera inside my arctic-parka as much as I could, pointing downwards because the EFs 15-85 isn't sealed. Still, the lens held up fairly well, but the joystick 'right' didn't work once I got it inside. Took the lens off, battery and CF card out, blew around the joystick as much as I could and left it. After a while, moving the joystick right worked as if I were pressing it in the centre. Then a few hours later it all worked perfectly fine again.
Nothing wrong with the 15-85 at all, I zoomed in/out and wiped a few times to get all the water away from the moving barrels, it's perfectly fine now.