And to clarify with a bit more testing... my initial tests last night were on the patio. I can get a valid fix and everything seems to work, but as soon as I start to move I start getting the "invalid..." message again and I lose the fix.

Right now, I've got the receiver in my office window and have maemo mapper running on the 770. I've noticed despite the fact that I haven't moved since I've gotten a fix there is a trail indicating movement (maybe 50 feet?) and as I type this, I see movement on the screen (I've actually drifted across the screen in slow movement back and forth).

Let me know what sort of info I can provide to help debug this problem.

Brad.