diff -up cups-1.4.6/scheduler/conf.c.conf_segfault cups-1.4.6/scheduler/conf.c
--- cups-1.4.6/scheduler/conf.c.conf_segfault	2010-08-31 06:18:38.000000000 +0200
+++ cups-1.4.6/scheduler/conf.c	2011-06-14 15:07:20.538275499 +0200
@@ -2498,11 +2498,11 @@ read_configuration(cups_file_t *fp)	/* I
 		      "FaxRetryLimit is deprecated; use "
 		      "JobRetryLimit on line %d.", linenum);
     }
-    else if (!strcasecmp(line, "Port") || !strcasecmp(line, "Listen")
+    else if ((!strcasecmp(line, "Port") || !strcasecmp(line, "Listen")
 #ifdef HAVE_SSL
              || !strcasecmp(line, "SSLPort") || !strcasecmp(line, "SSLListen")
 #endif /* HAVE_SSL */
-	     )
+	     ) && value)
     {
      /*
       * Add listening address(es) to the list...
@@ -3632,7 +3632,7 @@ read_location(cups_file_t *fp,		/* I - C
     else if (!strcasecmp(line, "</Limit>") ||
              !strcasecmp(line, "</LimitExcept>"))
       loc = parent;
-    else if (!parse_aaa(loc, line, value, linenum))
+    else if (value && !parse_aaa(loc, line, value, linenum))
     {
       cupsdLogMessage(CUPSD_LOG_ERROR,
                       "Unknown Location directive %s on line %d.",
@@ -3828,7 +3828,7 @@ read_policy(cups_file_t *fp,		/* I - Con
       if (FatalErrors & CUPSD_FATAL_CONFIG)
 	return (0);
     }
-    else if (!parse_aaa(op, line, value, linenum))
+    else if (value && !parse_aaa(op, line, value, linenum))
     {
       if (op)
 	cupsdLogMessage(CUPSD_LOG_ERROR,