Win 10 64 bit, Ubuntu, Linux Mint; GTX 560ti, GTX 680, GTX 970
Short description of error
Vertex color is watched out if previewed and rendered from geometry node in BI.
The vertex color should behave similar to a shadeless material node with vertex color paint turned ON.
Note: Problem confirmed by few artists.
Exact steps for others to reproduce the error
Open file, plug either material node or geometry node to output node.
PS: Please enjoy the ice cream sandwich :D