If you still see the black textures
after installing the latest graphics driver for your video card, you should startup Planeshift with -relight in the shortcut.
Example:
F:\Development\planeshift\psclient.exe -relight
It'll take a fair amount of time to relight the map (okay, hours for big areas like Bronze Doors) but the map will be normal again.
Don't forget to take the -relight out again after relighting, because else it will keep relighting the maps.
Good luck
