This is from fresh install b77, old savedvariables .lua deleted,too:
I scaled down Praid to 75 and I am getting double raid windows now.
One that scales and show only group 1 and another one that stays at 100%
And one error when trying to save hacks/sizing: /PerfectRaid.lua: 121: attempt to perform arithmetic on local 'x' (a NIL value)