Index: includes/media/Bitmap.php
===================================================================
--- includes/media/Bitmap.php	(revision 24546)
+++ includes/media/Bitmap.php	(working copy)
@@ -167,9 +167,18 @@
 
 			$src_image = call_user_func( $loader, $srcPath );
 			$dst_image = imagecreatetruecolor( $physicalWidth, $physicalHeight );
+                        
+                        //PNG-24 Alpha Trans 
+                        $background = imagecolorallocate($dst_image, 0, 0, 0);  //Make $dst_image all black
+                        ImageColorTransparent($dst_image, $background);         //Make $dst_image transparent
+                        imagealphablending($dst_image, false);                  //Turn off alphablending
+
 			imagecopyresampled( $dst_image, $src_image,
 						0,0,0,0,
 						$physicalWidth, $physicalHeight, imagesx( $src_image ), imagesy( $src_image ) );
+                        
+                        imagesavealpha($dst_image, true);                       //Make sure the Alpha Channel (transparency) saves
+                        
 			call_user_func( $saveType, $dst_image, $dstPath );
 			imagedestroy( $dst_image );
 			imagedestroy( $src_image );