Asteroid seeking probe encounters system failure- not Hayabusa

Recently a probe was launched to explore a distant asteroid. Along the way it encountered system failures which could possibly disrupt it's course. Sound like the JAXA Hayabusa mission to you? Actually this is what is currently happening to NASA's Dawn probe. The probe was launched in 2007 and is heading for the asteroids Vesta and Ceres. The problem has to deal with part of its attitude control system shutting down unexpectedly. NASA scientists do not believe that this problem will affect the outcome of the mission.