Hi,
FYI. I could not login as user debian from this freshly bmapped sd booted image, root is possible.
Long story short:
root@beaglebone:/lib/arm-linux-gnueabihf# ls -sla /
total 92
4 drwx------ 21 110 114 4096 Sep 25 21:06 .
4 drwx------ 21 110 114 4096 Sep 25 21:06 …
4 -rw-r–r-- 1 root root 40 Sep 26 2016 ID.txt
110 114?
chown root:root /
chmod 755 /
et voila, login user debian possible