Rovers cant reverse?

[smokestream888]

Hey guys

Got a really strange bug here, or I'm just missing something obvious. All my existing rovers and any new rovers can now not go in reverse. When I press 'S' to reverse, the rover just speeds up going forward, if I press 'W' it still just goes forwards. I've tried changing the assignments, setting up joystick control, inverting controls, but what ever I assign the 'Reverse' function under the rovers tab just causes the rover to go forwards. I've also tried all different designs of rovers to see if it was the way I built them, but no luck.

All other controls are fine, just the damn reverse gear in Jeb's rover!

Any help would be greatly appreciated.