I reversed the order of attaching shader objects for linking to solve an issue in the driver before, but now it appears it needs to be the other way around again? I don't know if these are the same cards that now want it different again due to changes in the glsl code, but I found another workaround for the first bug in a forum post (leaving out parameter names in the declarations), so with some luck both cases work? http://developer.nvidia.com/forums/index.php?showtopic=596