Well, I didn't show the advanced view because there's never anything out of the ordinary there.  It never shows anything out of the ordinary...only the diffuse image and the transparency map connected to the correct channels.  There is no pattern to the change in the material's behavior.  Every time I import the transparency map, or reload the textures, one of the above happens.  I've even duplicated the transparency map and saved it under another name, but the same thing happens with the new version..  But here you go...