--- linux-dellfw/net/netfilter/xt_string.c	2006-07-15 15:00:43.000000000 -0400
+++ linux-po/net/netfilter/xt_string.c	2006-08-03 21:06:13.000000000 -0400
@@ -37,7 +37,7 @@
 
 	return (skb_find_text((struct sk_buff *)skb, conf->from_offset, 
 			     conf->to_offset, conf->config, &state) 
-			     != UINT_MAX) && !conf->invert;
+			     != UINT_MAX) ^ conf->invert;
 }
 
 #define STRING_TEXT_PRIV(m) ((struct xt_string_info *) m)