MAYA: Black Preview Textures?

While working on cleaning up someone else's previous file, I've noticed that sometimes applying an imported shader texture causes the viewport preview of a texture to go black.  Easily remedied by heading over to the UV Texture Editor and swapping out the preview texture under:


UV Texture Editor > Textures > (your texture).


BAM.






(EDIT:)


Also if you have multiple texture files applied within the shader network, you can select different textures to preview as well (bump maps, displacementmaps, you name it.)