You probably typed your question while dunc was typing his answer
re-read the last page and you will have your answer!
Dan, take your time. I am very happy with 3.5 themed still and i am not in need of an update.
Just to let you know one thing i'd appreciate if you could look into it. We discussed it already.
I got three navigation apps, Igo being the most stable, Sygic failing sometimes and Navigon constantly loosing the GPS (note: the gps is only lost by the app, it is still there for all other apps).
Now i noticed that Igo also loses the GPS more often on 3.5 but recovers from it, e.g picks it up again, while navigon fails permanently after losing it a few times, then claiming there is no gps.
Google Navigation seems not to suffer from this.
SInce it is NOT the gps in itself failing but the readings i assume that there is something that makes it hard for some apps to keep a stable read. It might even be to do with parts of the system sitting on SD and the SD being tricky with the tweaks to read/write?
I cannot possibly answer this question myself as it must be something inside the system which i have no clue of. So that would be a typical question to the chefs to investigate the matter.
I know that this only affects a few but i think it would be interesting to find the actual cause of this and even it out.
Navigon is said not to be an App for Ginger even. So it probably already struggles to run on GB anyhow.