Photoshop CC 2014 exporting DDS with black MIP maps

Just wondering if anyone has had problems exporting DDS textures from Photoshop CC 2014?

Had no issues until recently, but now I can’t export a texture with MIP maps without all the sub-levels being black. I’ve confirmed that by loading the DDS back into Photoshop with the ‘load MIP maps’ option selected and also using Nvidia’s own Windows Texture Viewer.

I’ve even gone so far as uninstalling and reinstalling both Photoshop and the Nvidia plugins but the issue remains.

Any help would be much appreciated.