Hi there,
I've just bought a Olinuxino A20 and built a bootable SD card with Debian following this guide (http://olimex.wordpress.com/2013/11/05/building-the-ultimate-debian-sd-card-for-linux-with-kernel-3-4-for-a20-olinuxino-micro/) all went ok and Debian starts very quickly, the only problem is that XFCE4 automatically log-in as root.
I created another user but I'm not able to switch off the auto-login as root and enable the classical login shell when is asked for which user wants to log... I'm sure this is a quite stupid question but I'm not expert with XFCE4 and I didn't find information on internet about this problem. :-\
solved removing last line in inittab which automatically login root user.
I also removed startxfce4 from .bashrc in root home folder, I don't know why this set has been put there.. :S