--- /dev/null
+diff -ur hugin-2009.4.0.orig/src/foreign/vigra/vigra_impex/png.cxx hugin-2009.4.0/src/foreign/vigra/vigra_impex/png.cxx
+--- hugin-2009.4.0.orig/src/foreign/vigra/vigra_impex/png.cxx 2009-12-01 23:39:05.000000000 +0100
++++ hugin-2009.4.0/src/foreign/vigra/vigra_impex/png.cxx 2010-03-01 16:18:00.762151738 +0100
+@@ -271,8 +271,8 @@
+ // expand gray values to at least one byte size
+ if ( color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8 ) {
+ if (setjmp(png->jmpbuf))
+- vigra_postcondition( false,png_error_message.insert(0, "error in png_set_gray_1_2_4_to_8(): ").c_str());
+- png_set_gray_1_2_4_to_8(png);
++ vigra_postcondition( false,png_error_message.insert(0, "error in png_set_expand_gray_1_2_4_to_8(): ").c_str());
++ png_set_expand_gray_1_2_4_to_8(png);
+ bit_depth = 8;
+ }
+