This is the first time ever hear of such a thing happening (well except for that idiot who used to wash his K-7 under running tap water). I spilled maple syrup on my K-7 once, and the buttons by the top LCD became all sticky and they wouldn't come back up when I pressed them. Dripping a bit of water from my bottle fixed the problem.
I've also been in torrential downpours, violent blizzards and all manner of dusty environments. Never had either my K-7 or K-5 experience any ills from it. So if it turns out the seals on your camera were installed wrong, then I'd say you're a really unlucky photographer
Originally posted by WerTicus zooming a lens would not suck water into the body, only into the lens. (i would think)
Zooming the lens (ie. making it longer) causes a vacuum inside both the lens and the camera. Air gets sucked in, and water can get sucked in along with the air. I'm not aware where the vent holes are on the K-5, but I'd assume they're oriented towards the bottom somehow.