Kies worked for me on a 64-bit Win 7 system. I registered my device yesterday afternoon (Feb 1) and the "Unregistered Device" message was gone this morning. This seems consistent with Feb 2 at midnight release quoted above. It's possible, though, that there is some lag time if the download server does not have direct access to registration data and is updated infrequently (i.e. overnight).
The Infuse I successfully updated had an older ROM (ECKE3?). I have two additional phones with more recent versions to upgrade, so that might indicate if there's some kind of staged roll-out in place.
The Infuse I successfully updated had an older ROM (ECKE3?). I have two additional phones with more recent versions to upgrade, so that might indicate if there's some kind of staged roll-out in place.