RAC - requirement for Server entry on Master Server changed in 7.6 ?

I have just upgraded to 7602 accross the board and noticed the following.  I have a number of Remote Admin Consoles (also upgraded to 7602) which have had their system names changed in the recent past.  Following this change the server entries on the Master Server have NOT been updated to reflect the new system names.  To my surprise the RAC's still attach successfully to the two Master servers !  Has the need for this entry in the Master Server, Properties, Servers been removed in 7.6 ?  A point of note here - the site in question uses NBAC, in case this has any effect.

Thanks,

AJ.