Accented characters shouldn't pose a problem. Anything that works in Google Maps (or, more accurately, in the GPS Driving Directions web service, should work in Maemo Mapper. If it doesn't, it's a bug (and that sounds like what this is). I'll look into it.

Valid addresses [em]are[/em] saved in memory using auto-complete. As you tap in an address, it should display a list of all matching addresses as you tap. I tried to make it a combo box, but I had serious issues with the GtkComboEntry widget on Maemo, and besides, as the list gets large the combo box becomes nearly useless - autocompletion is more effective in this case.

The idea of including GPE Contact information (perhaps as part of the autocomplete feature mentioned above) is not a bad one. I'll add it to my TODO list... If you want to add it yourself, I'll accept (and possibly modify) any patch that you submit toward this end.

Thanks for the feedback.