Have just heard on news that Toyota have been advised of a potential problem on the Prius brakes, and an apparant "conflict" between the ABS and the braking regeneration system. By coincidence my RX400 with only 30,000 on the clock has just been checked over for a braking fault, and the symptoms were very similar to the prius - ie when braking on uneven or slippery surfaces, the braking system gets confused and braking power is lost momentarily. My dealer said they could find no fault, but strangely, after being checked and serviced, the fault disappeared! Hopefully not a cover up on the part of Lexus?? Any other RX owners experienced this?