diff -up zvbi-0.2.33/src/exp-gfx.c~ zvbi-0.2.33/src/exp-gfx.c
--- zvbi-0.2.33/src/exp-gfx.c~	2008-02-24 15:17:47.000000000 +0100
+++ zvbi-0.2.33/src/exp-gfx.c	2011-12-06 13:40:25.218139962 +0100
@@ -1672,11 +1672,11 @@ write_png			(gfx_instance *		gfx,
 	char title[80];
 	unsigned int i;
 
-	if (setjmp (png_ptr->jmpbuf))
+	if (png_jmpbuf (png_ptr))
 		return FALSE;
 
 	png_set_write_fn (png_ptr,
-			  (voidp) gfx,
+			  gfx,
 			  write_data,
 			  flush_data);