However, as MICHAELSDOWNEY notes, Garmin is experiencing a server connection issue right now. I think all methods of upload/import are going to fail until those servers are ready to receive new data.
I have the same issue of not being able to upload and also get re-directed from my XP laptop using the lastest version of Mozilla Fiefox yet managed to upload from my Vista desktop using the same browser??? Admittedly it is bloody annoying and like others have said why fix if it ain't broken. Anyway did Garmin not user test the new version/update first as web design good practice!! Beginners error eh??