I've been trying to resolve the Google Maps Navigation "locking up" issue and I think I've finally figured out what causes it! It seems that any time I start Google Maps Navigation after I plug the phone into the car dock, it locks up. This includes even if I plug it into the car dock and then remove it from said dock then try to start up Navigation.
I wonder if it's a combo of the latest upgrade + the "Car Cradle" app that messes things up...
Not necessarily, mine just did the same thing just by using it. It froze on the logo. I did a hard reset of the phone, cleared the data for Maps and Navigator, and then fired it back up, and it worked fine. There was an update to Google Maps the other day, and then it hung. I wonder if there is something that happens in the updates that corrupt the local data files, and when it tries to load them, it can't, and hangs.
I also have the problem with Maps/Navigation locking up when I make a request to find an address or map. this is what I have found out: if I use Maps before I have a GPS lock the program seizes up, if I use program after I have GPS lock Maps/Navigation works perfectly. I have found that the app GPS Status provides me with fastest lock time even faster than GPS Test app.
This is not a solution but you may find it a useful work around.