I am a relative newbie although I have successfully installed SD on a 7" Chinese unit and that works perfectly. However I wanted to try it on a Navigon 8410 due to the very bright screen on these units, as although the 7" display is a much better size for my old eyes, is not bright enough to be readable in the air.I installed SD on a Navigon 8410 - with a big thanks to Pink Leader for the memory card files - and it is working OK .... of sorts. The programme starts and runs fine and I have to say at this point I am extremely impressed with the software. It is way ahead of anything else out there including the £1,000+ offerings. However when I want to edit, save or need to type in a destination the keyboard does not appear as it does on the 7" unit. The same if I click on the toggle keyboard under system menu as nothing happens. Another problem, but one I could live with, is that clicking the exit button on the system menu causes the Navigon to freeze which also happens if I click exit on the start up screen and needs to be switched off to reset.
This happens on both version 1.4.4 and the beta 1.4.5 so I believe it to be the unit software rather than SD but if that makes me sound like I know what I am talking about, then I can assure you that I do not!
Hope someone has had the same problem and knows a fix?
Regards