Has anyone else tried Navigon after the iOS4 update? Since I updated, there is a problem with the panarama 3D mode. The display shows double street names as well as other issues. If I turn it off and just use 3D it returns to normal. I might try to uninstall the panorama feature then reinstall it. Otherwise, it might have to wait for an update.
Might be an iOS4 related bug, I've seen other reports of that by users on the forums. TomTom has it worse right now, likes to crash a lot when planning a route.
Here's hoping both apps get updated promptly.