Do you park the car on a slope with the front pointing downhill? I had the same thing along with loss of brake fluid for the first month I owned the car. I have a theory explaining the brakes...the gromets on the lines going into the top of the master cylinder were leaking, but the leaking brake fluid swelled the gromets so they have not leaked in the last 6 weeks. The same thing happened with the coolant (the low fluid message came on about once a week for the first month and then stopped) but I do not yet have a theory for how that stopped.