Attached Link: http://www.senosoft.com/

This is because the alpha channel of the thumb picture is inverted. You can fix this with the P3dO Rsr2Png plugin. Convert from Rsr->Png then from Png->Rsr again (there's an option that will remove the converted RSRs) and all your PNGs will show in Poser. Rsr2Png available in freestuff there and on my website. yarp

Yarp - author of P3DO Organizer for Poser