The glitches that seemed to be spreading and worsening on the most powerful camera ever sent to another planet seem to have stabilised. That has left the HiRISE (High Resolution Imaging Science Experiment) camera on NASA's Mars Reconnaissance Orbiter (MRO) largely intact – and still capable of returning stunningly detailed pictures. But the cause of the problems remains unknown. Soon after the August 2005 launch of MRO, noise cropped up in one of HiRISE's detectors. By late November 2006, the problem had spread to another detector among the 14 pairs in the camera and had worsened in the one that first showed problems.