I setup a new 2012 server today, I'm tying to migrate my config over from a 2008 server. When I go to import the config and select the migrate option it errors out when analyzing the file with "Configuration backup file has unsupported version or corrupted contents". I verified that both versions of the software were the same, 184.108.40.2067. I didn't do a SQL backup but instead setup a clean database install with SQL 2012. From what I read you don't need the database backed up as long as you have the configuration.
Thanks for the help.