Bought a new 2012 SE, 4 cyl. near the end of Oct, 2011 and noticed the sloshing on the right front side after about a week or two of owning it. It occurs after I accelerate to approx. 15mph after a cold start (more than 4-ish hrs of non-driving), either being outside or in a non-heated but attached garage. The sound lasts for about 3 sec and isn't too loud (can be drowned out by a not-too loud radio), but can certainly be heard when the radio's off. Heat is always off when this occurs. I live in Michigan, but our fall was warm and we've only had a couple of nights below freezing (and just below 32 deg, too).