Platform: Android at Samsung Galaxy Si9000
Notes: Screenshots are made under Windows at home, because i was driving the car.
In my tests sometimes the vocal direction instructions are wrong. The display is always right, but
the voice is sometimes -1. I have heard one like this (in german, not exact wording):
"Bitte den Kreisverkehr an der nullten Ausfahrt verlassen.", see 
But the right wording should be:
"Bitte den Kreisverkehr an der ersten Ausfahrt verlassen."
The wrong vocal direction instructions are not always wrong. I´ve find out, that often (but not always)
the instructions correct, when the streets have the same color (e.g. yellow, see ) and always
fails on roundabouts with different street colors (e.g. red, yellow and white, see ).