This morning was 56 degrees, slight rain, no big deal. Overnight low was pretty warm, near 50. The car had been in the garage over the Thanksgiving holiday, and the garage doesn't warm up nearly as fast as the outside air, so I wasn't really too surprised to see the "Regenerative Braking Temporarily Limited" message this morning. But it didn't seem like my regen was really limited -- the car felt like full regen was on, and the black/green energy usage bar was going to green when I felt regen. I wasn't on any road where I could monitor the wh/m to really verify if I had regen (i.e. no sustained downhills), so I can't be sure. Basically it seems like the trigger for the warning isn't 100% coupled to whether or not actual regen is happening.