This is how my setup works in beta :
http://www.youtube.com/watch?v=5tyIzjhyySg
This is the issue :
http://www.youtube.com/watch?v=bxrLdsbnt6g
The error in chat is :
Power Auras Classic: Error:
...rface\AddOns\PowerAuras\Types\Displays\Variables.lua:158: Display ID 256 does not resolve to a valid display