The iOS 5.0 will be available tomorrow, and similar to many other apps the OSMTrack doesn't work properly under iOS 5.0. The version 3.0.2 just repairs what is broken by iOS 5.0.
I know, a regular bugfix update is long overdue, and the wish list in comments to my previous posts is long, but somehow I'm still not quite up there... and I'm sorry for that! Hopefully, things will go better in some near future that I have a little bit more time.