It is with a heavy heart I've decided to un-install the Graphene Theme for the time being.
It has served me well for a year or so but recently the annoying white flashes when page changing has become too much to handle.
Just did a brand new install on a brand new re-provisioned server
and de-activated wp cache which comes with the default wordpress install and the problem still persists.
I'll still keep checking to see if the problem gets resolved but for now its time to head to pastures new. :(
Thanks to the devs who worked so hard on the theme