The Martians are at it again :)
Well, I think it must be pretty obvious by now that Mars is inhabited and that they don't want us knowing what they are up to. I mean, can you honestly believe that our Earth scientists are so inept that they can't land a vehicle on Mars and successfully drive it around for a few weeks? What is this, the 4th failure in a row? Rather than explaining it by doubting our brave, bold and brilliant Scientists let's look at the more obvious explanation: the Martians are shooting the space craft down and if that fails they are sneaking up on the rover and snapping its antennas (or should that be antennae?)
Of course there could be another explanation for so many failures, perhaps they are using a Microsoft operating system.
NASA Scrambles to Diagnose Rover Signal Problems