--- dillo-0.8.6/src/png.c~	2005-10-27 18:20:14.000000000 +0200
+++ dillo-0.8.6/src/png.c	2010-01-28 21:49:04.810003532 +0100
@@ -355,7 +355,7 @@
             return;            /* need MORE data */
          }
          /* check the image signature - DON'T update ipbufstart! */
-         if (!png_check_sig(png->ipbuf, DATASIZE)) {
+         if (png_sig_cmp(png->ipbuf, 0, DATASIZE)) {
             /* you lied to me about it being a PNG image */
             png->state = IS_finished;
             break;