diff -ru InsightToolkit-3.18.0/Code/IO/itkPNGImageIO.cxx InsightToolkit-3.18.0.new/Code/IO/itkPNGImageIO.cxx
--- InsightToolkit-3.18.0/Code/IO/itkPNGImageIO.cxx	2008-10-01 00:01:48.000000000 +0200
+++ InsightToolkit-3.18.0.new/Code/IO/itkPNGImageIO.cxx	2010-07-03 00:31:20.000000000 +0200
@@ -211,7 +211,7 @@
   // minimum of a byte per pixel
   if (colorType == PNG_COLOR_TYPE_GRAY && bitDepth < 8) 
     {
-    png_set_gray_1_2_4_to_8(png_ptr);
+    png_set_expand_gray_1_2_4_to_8(png_ptr);
     }
 
   // add alpha if any alpha found
@@ -346,7 +346,7 @@
   // minimum of a byte per pixel
   if (colorType == PNG_COLOR_TYPE_GRAY && bitDepth < 8) 
     {
-    png_set_gray_1_2_4_to_8(png_ptr);
+    png_set_expand_gray_1_2_4_to_8(png_ptr);
     }
 
   // add alpha if any alpha found