Clara Moskowitz at Space.com, on the Mars rover:
The computer problem is related to a glitch in flash memory on the A-side computer caused by corrupted memory files, Cook said. Scientists are still looking into the root cause the corrupted memory, but it’s possible the memory files were damaged by high-energy space particles called cosmic rays, which are always a danger beyond the protective atmosphere of Earth.
NASA says the rover should be good to go, as it can run on the B-side computer for some time.
In all my time at the Genius Bar, I never saw anything damaged by cosmic rays. So, yay atmosphere!