From Navigon's FAQ:
http://faq.navigon.com/opencms/inte...q&topicId_0=121&topicId_1=170&topicId_2=10714
Our software automatically turns off the battery saving function that turns off the screen. Should yet a new application start, like for instance an upcoming meeting, the function is turned on again. Therefore, please always confirm the pop-up to assure that the display isn't turned off.In isolated cases we have heard, that the screen turns dark allthough there wasn't a message or an other application. The cause for this are charging accessories that aren't certified for use with the iPhone 3G or the iPhone 3G S. We therefore would like to advise you to only use accessories that have been certified for use with the iPhone 3G or iPhone 3G S.
I have the iPhone 4 and the newest version of Navigon (not yet updated for the iPhone 4). I have a couple of issues that are VERY annoying:
1) I am experiencing the dimming issue. I had Pandora playing in the background (using the new feature in iOS4), and after a couple of minutes, the screen on the phone dimmed. I keep the phone up in front of my steering wheel by my RPM display (my MPH, etc. are up on the dash in my Civic). Up where my phone is is darker, and I think that the sensor on my phone thought that, and it dimmed the screen. The problem was I could not get the screen to undim even by exiting the app. I had to actually restart the phone fully. I did change my settings to not auto dim at all. I will test with that.
2) If you are listening to Pandora in the background, when the voice navigation comes on (
Navigon PLEASE let us turn this off), the music attenuates during the voice command, then waits about 5 seconds before coming back on at full volume. If I am listening to the iPod functions through Navigon then the voice over just attenuates the music while speaking, and then the music comes right back up. If I try and lower the voice commands, and I am using the iPod function through Navigon, both go up and down with the slider in the Navigon Options screen. I will say it again
Navigon PLEASE let us turn this off.
Overall it is a good app. It is in bad need of an update for iOS4, and the voice needs better control, like OFF.