When you go through a bad road with stones and stuff, the symbian nokia N8 shakes a lot, even with a proper holder. Then the waze client freezes and goes off. This is even turning off all other programs, avoiding processing overcharge.

I don't know if it's a client problem, but seems to be.

You could add a button to fix the desired view, horizontal or vertical, in case you don't want your waze-client display orientation switching all the time 'till die.