Operating SQL Server 2005 on Server 2003 in a 2012 domain

Hi,

I posted in AD forum, but they point me back to SQL forum.

Again my question is if there are any thoughts on running a sql2005 server (on a 2003 windows server) within a domain that includes a 2012 domain controller, meaning the AD schema has been updated.  I run 3 sql 2005 servers that are linked, and I know that the service accounts are set with ServicePrincipleNames for the sql service.

1. Would the sql2005 server that runs on a server 2003 standard OS, have any issues operating in a domain that has a 2012 domain controller (mixed with other 2003 domain controllers)?

Thanks

Robert