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diff -up openssl-0.9.8g/ssl/t1_lib.c.no-extssl openssl-0.9.8g/ssl/t1_lib.c
--- openssl-0.9.8g/ssl/t1_lib.c.no-extssl	2007-10-19 09:44:10.000000000 +0200
+++ openssl-0.9.8g/ssl/t1_lib.c	2008-08-10 21:42:11.000000000 +0200
@@ -132,6 +132,11 @@ unsigned char *ssl_add_clienthello_tlsex
 	int extdatalen=0;
 	unsigned char *ret = p;
 
+	if (s->client_version != TLS1_VERSION && s->client_version != DTLS1_VERSION)
+		{
+		return ret;
+		}
+
 	ret+=2;
 
 	if (ret>=limit) return NULL; /* this really never occurs, but ... */
@@ -202,6 +207,11 @@ unsigned char *ssl_add_serverhello_tlsex
 	int extdatalen=0;
 	unsigned char *ret = p;
 
+	if (s->version != TLS1_VERSION && s->version != DTLS1_VERSION)
+		{
+		return ret;
+		}
+
 	ret+=2;
 	if (ret>=limit) return NULL; /* this really never occurs, but ... */