For anyone who likes driving rovers as much as I do, you'll almost definitely come across this problem at some time or another. Here's my solution, which has saved countless Kerbals for me: 1. After a kerbal becomes non-responsive, stand another kerbal next to him, then ALT-TAB out of the game. 2. Go to your Saves folder and back up your Quicksave file by renaming it to whatever you want (VERY IMPORTANT!!). 3. Go back into the game and press F5 to create a new Quicksave file. 4. ALT-TAB out of the game again. 5. Open your new Quicksave file in any text editor and find the affected kerbal in it. 6. Open a SECOND instance of the Quicksave file and have them both on your screen side-by-side. 7. In the second Quicksave file, find the "good" kerbal that you stood next to the non-responsive one. 8. Now compare the two Kerbals in the files and you will see what is making the kerbal non-responsive. 9. Edit those lines to match the responsive one. 10. Save ONLY the edited Quicksave file. 11. Go back into the game and hold F9 to load your file. If you've done it right your kerbal will come to life! If not, you can try again and again without having to load and re-load the game every time. As long as you have a good backup of your original Quicksave file you can always revert back and create a new file to edit, and if you don't succeed you've lost nothing. Note: Saving this file with Notepad will default to saving as a .txt file and it won't load. Use "Save As" and make sure that when it lists files in the folder, the extension drop-down list is set to "All Files", and not ".TXT", and add the ".SFS" extension. I hope this help someone. There's nothing worse than a bug costing a Kerbal's life.