diff -up BlockOutII-2.3/contrib/ImageLib/src/png/hpng.c~ BlockOutII-2.3/contrib/ImageLib/src/png/hpng.c
--- BlockOutII-2.3/ImageLib/src/png/hpng.c~	2011-12-14 11:07:35.000000000 +0100
+++ BlockOutII-2.3/ImageLib/src/png/hpng.c	2011-12-14 11:09:53.542044115 +0100
@@ -45,7 +45,7 @@ int LoadPngImage(PNG_IMAGE *d) {
 	// ---------------- Error handling
 
 	png_set_error_fn(png,NULL,my_png_error,NULL);
-  if (setjmp(png->jmpbuf)) {
+  if (setjmp(png_jmpbuf(png))) {
  	  png_destroy_read_struct(&png, &info, &endinfo);
 	  return 0;
 	}
@@ -154,7 +154,7 @@ char *WritePngImage(char *file_name,unsi
    {
     	sprintf(PngErrorMessage,"png_create_info_struct() failed");
       fclose(fp);
-      png_destroy_write_struct(&png_ptr,  png_infopp_NULL);
+      png_destroy_write_struct(&png_ptr, &info_ptr);
       return PngErrorMessage;
    }