HI Eric, strangely, I think this issue could possibly have something to do with Mesh painting. I was trying out the shading network that you suggested to me on my other question thread about mesh painting: https://answers.unrealengine.com/questions/79471/vertex-paint-with-rgb-and-alpha.html
I was painting using the final image buffer, when I switched between game and edit mode, after looking through the individual R, G, B and A views in the paint tool. Now this frame buffer looks like the image above in both modes rather than only in the edit view. And thinking back on it, this problem has only arisen during the time that I have been trying to use mesh painting. Anyway, I thought that there might possibly be a connection and that you should be made aware of it.
Thanks,
Matt