I looked at the images provided. The ones that do not need transperancies work fine. The ones that do need transparencies do not work, ie, there is no transperancy. Loading up with gimp, there is no alpha channel. And hence no transperancy. It seems that if the image has a matte, it also has a transperancy. But to be honest, other than a little fiddling I have done with the PNG's, I don't know much about the format. I notice that some images currently in the repository, like the spiked shield, have the same problem with lack of transperancy.