Glad you got your problem resolved!
In the tutotial mentioned, None was only used in the 'definition' section where what "Strong, Normal, None" actually means.
In the actual example of what to do, it shows:
$ sudo /sbin/e-smith/db configuration show passwordstrength
passwordstrength=configuration
Admin=none
Ibays=none
Users=none
followed later by (to set strength to 'Strong')
$ sudo /sbin/e-smith/db configuration setprop passwordstrength Users strong
That's one of the traps of Linux, uppercase/lowercase differrences.
Cheers
Ian