I am getting an error on my 770 with 2007he edition also. The GPS pairs fine but I get a GPSD error when Maemo Mapper tries to connect to my gps. I have the bluetooth option selected and MMapper found it when doing a scan but will not connect.

I went back to 2.05 on my 770 and it works fine with my GPS.

2.2 works great on my n800 with 2008 beta installed using the same GPS unit.