Been fighting with green pixel corruption, It looks like noise from somewhere. When I swapped out the supplied HDMI cable the effect is less pronounced but still there. I am running the display on a seperate 2a supply to make sure it was not a power issue. The RPi2 display is perfect if I connect it to one of my normal monitors. So I think the RPi2 is fine. I'll attach a picture tomorrow.
In short, display quality is very poor and very dependant on which HDMI cable out of my collection but always there. Spent all evening playing with config files to try to fix.
What you think?