Had problem inputing the serial numbers for the maps in 3.5.18 on my Nokia N82. Downgraded to 3.4.23. I was able to input the serial number but the voice and fonts don't seem to work. It gave some kind of voice error then application terminates. I manage to fix the voice by copying over the voice from the 3.5.18 and place it on the 3.4.23. NDrive now startup with ???.???.??? fonts. I used the same method of copying over the fonts from 3.5.18 to 3.4.23 but no luck. Any idea guys?