http://bugs.gentoo.org/379297
http://mplayerhq.hu/pipermail/mplayer-cvslog/2011-May/042075.html

--- sub/subreader.c
+++ sub/subreader.c
@@ -173,6 +173,8 @@
 	    break;
 
 	case 3: /* get all text until '<' appears */
+	    if (p - text >= LINE_LEN)
+	    sami_add_line(current, text, &p);
 	    if (*s == '\0') break;
 	    else if (!strncasecmp (s, "<br>", 4)) {
                 sami_add_line(current, text, &p);