I've just bought a second-hand Garmin Nuvi 310 sat nav.
The unit is fine when selecting one of the numerous locations that you can choose from (petrol stations etc), but if I try to select a destination using the postcode option, I encounter a problem. I select the 'spell city/postal code' button, which gives me a 'search all cities' option. After clicking this, it takes me to the 'enter house number' option. My house has a name and not a number, so I just press done (in order to get to the other options). When I press 'done' though, it turns itself off!
I updated the firmware, using the webupdater program from the garmin site, but it hasn't fixed the problem. I just wondered if anyone knows of this problem, and if there's any way of fixing it.