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I don't want or need the car mode that pops up whenever I plug into USB - is there a way to disable this?
car mode pops up when you plug into usb??
I've never heard of car mode. I use a palm pre car charger from my old phone and all it does is charge...
That link above indicates it's something with a fifth pin in the USB cable (?) - it must also be present in car docks so it activates the car mode.
Get a different charger.
Car docks...uhh...which one? Most that I have seen you supply your own power to. you have one that has power also?

Go in the Navigator app and in Settings you can tell it to not automatically start. It should only do it with a car kit though. It is turned on in mine and it's never come up when plugging in.
What car mode!?!?!?!?
Your method works at disabling the Navigator screen... but the home button no longer will have the same functionality (at least in my experience).
What functionality is that? I turned it off and my home button works the same as it always did.
That link above indicates it's something with a fifth pin in the USB cable (?) - it must also be present in car docks so it activates the car mode.
I'll check again with my charger and report back.
Car docks...uhh...which one? Most that I have seen you supply your own power to. you have one that has power also?
I just tried it again. The home button doesn't work once I disable navigator screen.