I thought 1206 is still beta since its not yet visible on Asus download page. Or at least it wasn't the day before yesterday. So I didn't try 1206 yet because my system is stable at current settings. I only have some issues with double booting and OC profile not working when SATA is enabled.

As far as I know 1206 only provides better memory compatibility but I'm not sure (thought I read it somewhere across the forum).