I looked through the hijack diffs, only saw some suspicious things, but haven't been able to put my finger on any specific problem yet. Considering the other report it is either a hijack bug, or something that is easy to get wrong. Maybe there is some race (f.i. between being taken out of the menu and registering the buttons).

On the bright side, I've added initialization of the map center when no route is loaded so that the map isn't as distorted, and used ellweber's suggestion to basically ignore bearings when our speed is below some threshold.

Right now I'm experimenting with routing and map drawing based on tiger/line files. Pretty tough to get right while avoiding using up too much CPU or memory. And to actually get the planned route to end up where you're going