GPS Software version

Has anyone heard the pros and cons (other than losing all your user customization settings and waypoints) of upgrading to Version 3.0 of the main and GPS software for the Garmin 430/420? According to the POH addendum on the Garmin web site its supposed to make the GPS “IFR-oceanic/remote operations” rated by adding FDE (fault detection and Exclusion). Anyone heard of any problems?
Not that I plan on any trans-Atlantic flights[:S], but the possibility of getting the upgrade done for free is staring me in the face.
LATER O.K., O.K. Next time I’ll do the forum search first! nevermind! LOLOLOLOL [:$]