[Knitebane]

The rovers run Wind Rivers VxWorks embedded OS.

An article detailing it is here.

[randog]

Yeah, I got that from RockyMtnMan's link. I've got a little more faith in the Rover now that I know that it isn't using Java.

[MrConfettiMan]

You mean VxDoesn'tWorks. :)

It's my understanding the problem has to do with the file / memory management code within VxWorks.

Here's another article on the subject: Thinking on Mars: The Brains of NASA's Red Planet Rovers