I got a cheap Chinese generic brand GPS navigator unit. Came loaded with R66. Bleuck!
Swapped it to iGo6. Much better.
Then saw iGo8 - very nice. So loaded that, had a few problems getting it to go to widescreen mode... but after a bit of messing about with a few 'patches' it all worked fine. Tested thoroughly and it seemed stable.

But then after a few days, things started to go pear shaped... ask it to find a street (any street!) or switch from 2d to 3d mode, and the device would go through a cold reboot. Hmm,

It took ages, at least 10 attempts of formatting the SD card and reloading what I'd done before, to get it working again. Each and every time, I was doing the very same thing, over and over again... following all common sense rules. So I'm a bit mystified why the process is so 'flaky'.

Anyway now that I have it running again, I've write protected the SD card. Is there any problem in doing that? I won't be wanting to save any tracks or favourite destinations if that has any bearing on things.