Hi, I have the exact same issue as pht. I'm using Maya 8.5 on a Mac Pro.
On immediate startup of Maya the Script Editor displays the following:
// Warning: File not found: /Applications/Autodesk/maya8.5/Maya.app/Contents/icons/3Dx_Cube.xpm //
file -f -new;
// ./untitled //
commandPort -securityWarning -name commandportDefault;
// MayaLive version 8.5// Saving runtime commands to : /Users/lcooper/Library/Preferences/Autodesk/maya/8.5/prefs/userRunTimeCommands.mel
// Saving hotkeys to : /Users/lcooper/Library/Preferences/Autodesk/maya/8.5/prefs/userHotkeys.mel
// Saving named commands to : /Users/lcooper/Library/Preferences/Autodesk/maya/8.5/prefs/userNamedCommands.mel
// Preferences saved. See Script Editor for details.
There is no response from my SpaceNavigator until I type the command: MagellanStartup;
On restarting Maya the functionality ceases to work again until the command is re-entered.
So like you mentioned quinn the script appears to be damaged.
May I ask where in "TFM" it explains the issue and provides a solution?

I have just re-downloaded the driver (1.2.0) and overwritten the existing scripts. Which did not resolve the problem.
I would appreciate any help that can be provided.
Thanks in advance.