AFter 6.28 my home Blink unit would not charge my Karma. The public chargers worked fine as did the 110. We thought it was the unit but it turns out it is the car. After several weeks of engineers from Ecotality looking at things, changing units, analyzing we found that 6.28 has altered the cars computer interaction with a charger. If there is a charging schedule entered into the charging unit, the car will not charge at all- it gets confused and "clamps up" kind of like an angry girlfriend (sorry to any women on the site). You have to delete all scheduled charges and make sure the unit only charges immediately on connection. The Ecotality engineers have notified Nedim at Fisker and hopefully this bug will be patched in a later software flash update. It is not a problem 6.15 or earlier.