Index: plugins/net.refractions.udig.render.wms.basic/src/net/refractions/udig/render/internal/wms/basic/BasicWMSRenderer2.java
===================================================================
--- plugins/net.refractions.udig.render.wms.basic/src/net/refractions/udig/render/internal/wms/basic/BasicWMSRenderer2.java	(revision 31783)
+++ plugins/net.refractions.udig.render.wms.basic/src/net/refractions/udig/render/internal/wms/basic/BasicWMSRenderer2.java	(working copy)
@@ -511,6 +511,8 @@
     private boolean formatSupportsTransparency( String format ) {
         if (format.equalsIgnoreCase("image/png")) //$NON-NLS-1$
             return true;
+        if (format.equalsIgnoreCase("image/png8")) //$NON-NLS-1$
+            return true;
         if (format.equalsIgnoreCase("image/gif")) //$NON-NLS-1$
             return true;
         if (format.equalsIgnoreCase("image/tiff")) //$NON-NLS-1$