diff --git a/include/zrtp_version.h b/include/zrtp_version.h
index 3f4640e659..bcf183f9be 100644
--- a/include/zrtp_version.h
+++ b/include/zrtp_version.h
@@ -12,8 +12,8 @@
 
 #define LIBZRTP_VERSION_MAJOR		1
 
-#define LIBZRTP_VERSION_MINOR		10
-#define LIBZRTP_VERSION_BUILD		594
-#define LIBZRTP_VERSION_STR			"v1.10 594"
+#define LIBZRTP_VERSION_MINOR		12
+#define LIBZRTP_VERSION_BUILD		598
+#define LIBZRTP_VERSION_STR			"v1.12 598"
 
 #endif /*__ZRTP_VERSION_H__*/
diff --git a/projects/gnu/configure.in b/projects/gnu/configure.in
index 4e53494d69..1af09c172e 100644
--- a/projects/gnu/configure.in
+++ b/projects/gnu/configure.in
@@ -1,5 +1,5 @@
 # 
-# Copyright (c) 2006-2009 Philip R. Zimmermann. All rights reserved.
+# Copyright (c) 2006-2011 Philip R. Zimmermann. All rights reserved.
 # Contact: http://philzimmermann.com
 # For licensing and other legal details, see the file zrtp_legal.c.
 # 
@@ -32,7 +32,7 @@ case $target_os in
 esac
 
 
-AM_INIT_AUTOMAKE([libzrtp], [0.91])
+AM_INIT_AUTOMAKE([libzrtp], [1.12])
 AX_PREFIX_CONFIG_H(../../include/zrtp_config_unix.h,ZRTP,config/config.h)
 
 CFLAGS="$CFLAGS -Wno-unused-parameter -fno-strict-aliasing -fPIC -DZRTP_AUTOMAKE=1"
diff --git a/src/zrtp_protocol.c b/src/zrtp_protocol.c
index f271309a0a..e50a00da76 100644
--- a/src/zrtp_protocol.c
+++ b/src/zrtp_protocol.c
@@ -314,12 +314,30 @@ static zrtp_status_t _derive_s0(zrtp_stream_t* stream, int is_initiator)
 		comp_length = zrtp_hton32(1L);
 		session->hash->hash_update(session->hash, hash_ctx, (const int8_t*)&comp_length, 4);
 
+		
+		switch (stream->pubkeyscheme->base.id) {
+			case ZRTP_PKTYPE_DH2048:
+			case ZRTP_PKTYPE_DH3072:
+			case ZRTP_PKTYPE_DH4096:
+				comp_length = stream->pubkeyscheme->pv_length;
+				ZRTP_LOG(3,(_ZTU_,"DH comp_length=%u\n", comp_length));
+				break;
+			case ZRTP_PKTYPE_EC256P:
+			case ZRTP_PKTYPE_EC384P:
+			case ZRTP_PKTYPE_EC521P:
+				comp_length = stream->pubkeyscheme->pv_length/2;
+				ZRTP_LOG(3,(_ZTU_,"ECDH comp_length=%u\n", comp_length));
+				break;
+			default:
+				break;
+		}
+		
 		bnBegin(&dhresult);
-		stream->pubkeyscheme->compute( stream->pubkeyscheme,
-									   &stream->dh_cc,
-									   &dhresult,
-									   &stream->dh_cc.peer_pv);
-		comp_length = stream->pubkeyscheme->pv_length;
+		stream->pubkeyscheme->compute(stream->pubkeyscheme,
+									  &stream->dh_cc,
+									  &dhresult,
+									  &stream->dh_cc.peer_pv);
+				
 		bnExtractBigBytes(&dhresult, (uint8_t *)buffer, 0, comp_length);
 		session->hash->hash_update(session->hash, hash_ctx, (const int8_t*)buffer, comp_length);
 		bnEnd(&dhresult);
diff --git a/src/zrtp_utils_proto.c b/src/zrtp_utils_proto.c
index 9e3d0e058f..c7e4459148 100644
--- a/src/zrtp_utils_proto.c
+++ b/src/zrtp_utils_proto.c
@@ -430,14 +430,16 @@ zrtp_status_t _zrtp_compute_preshared_key( zrtp_session_t *session,
 {
 	static const zrtp_string8_t presh_key_str	= ZSTR_INIT_WITH_CONST_CSTRING(ZRTP_COMMIT_HV_KEY_STR);
 	zrtp_string32_t preshared_key = ZSTR_INIT_EMPTY(preshared_key);
-	static const uint32_t length_rs = ZRTP_RS_SIZE;
-	static const uint32_t length_zero = 0;
+	static uint32_t length_rs = ZRTP_RS_SIZE;
+	static const uint32_t length_zero = 0;		
 	
 	void *hash_ctx = session->hash->hash_begin(session->hash);
 	if (!hash_ctx) {
 		return zrtp_status_alloc_fail;
 	}
 	
+	length_rs = zrtp_hton32(length_rs);
+	
 	if (rs1) {
 		session->hash->hash_update(session->hash, hash_ctx, (const int8_t*)&length_rs, 4);
 		session->hash->hash_update(session->hash, hash_ctx, (const int8_t*)rs1->buffer, ZRTP_RS_SIZE);
@@ -466,8 +468,8 @@ zrtp_status_t _zrtp_compute_preshared_key( zrtp_session_t *session,
 	
 	if (key_id) {
 		session->hash->hmac_truncated( session->hash,
-									   ZSTR_GV(presh_key_str),
 									   ZSTR_GV(preshared_key),
+									   ZSTR_GV(presh_key_str),									   
 									   ZRTP_HV_KEY_SIZE,
 									   ZSTR_GVP(key_id));
 	}