Smoke from the vents could also be the HVAC control panel where the switches are. If you just caught it out of the corner of your eye coming from the center vents, the smoke coming from the HVAC controls just was flowed up and was blown forward looking like it came from the vents. The Sebring just did this a few weeks back and it was the vent switch going out.
It's under warranty, have them fix it - ask to be shown what's wrong and to see the part after it's fixed too.
2013 JKU Sport, billet, auto, 3.73, LSD, 315/75/16 Duratracs on MB 72, 10A springs, Bushwacker flatties
Sold - 2005 TJ, red, auto, 3.73, 33" Duratracs, 4" lift
Ice storm casualty in 2007 - 2003 TJ, green, auto, 3.73, 33" Duratracs, 4" lift