I found a drop of oil in my garage floor. Crawled under the Supra to find a drop handing below the differential cooling fins. This is not easy to get to while the car is on the ground. I don't see any oil higher than the drain plug. If it was coming form the vent I would expect to see oil higher on the gearbox. I will call my local dealer tomorrow.From what i've experienced with this while owning the car since October is that this is normal. Mine has stopped leaking, Chris Hill noted to me last night that his has stopped leaking as well.