diff --git a/coreapi/callbacks.c b/coreapi/callbacks.c
index 6bdecc4b584885e271420efa581301a432a0c0ae..1c87f88ced3045ee03ef834de121badb75a71e37 100644
--- a/coreapi/callbacks.c
+++ b/coreapi/callbacks.c
@@ -845,7 +845,7 @@ static bool_t is_duplicate_msg(LinphoneCore *lc, const char *msg_id){
 static void text_received(SalOp *op, const SalMessage *msg){
 	LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal_op_get_sal(op));
 	if (is_duplicate_msg(lc,msg->message_id)==FALSE){
-		linphone_core_message_received(lc,msg);
+		linphone_core_message_received(lc,op,msg);
 	}
 }
 
diff --git a/coreapi/chat.c b/coreapi/chat.c
index 29af16eecd38b61b0db10e07cc05678cf33a387c..b9894ea8fabbf7750b23b14e7921ae238a771604 100644
--- a/coreapi/chat.c
+++ b/coreapi/chat.c
@@ -25,8 +25,19 @@
 #include "linphonecore.h"
 #include "private.h"
 #include "lpconfig.h"
- 
- LinphoneChatRoom * linphone_core_create_chat_room(LinphoneCore *lc, const char *to){
+
+/**
+ * @addtogroup chatroom
+ * @{
+ */
+
+/**
+ * Create a new chat room for messaging from a sip uri like sip:joe@sip.linphone.org
+ * @param lc #LinphoneCore object
+ * @param to destination address for messages
+ * @return #LinphoneChatRoom where messaging can take place.
+ */
+LinphoneChatRoom * linphone_core_create_chat_room(LinphoneCore *lc, const char *to){
 	LinphoneAddress *parsed_url=NULL;
 
 	if ((parsed_url=linphone_core_interpret_url(lc,to))!=NULL){
@@ -38,16 +49,18 @@
 		return cr;
 	}
 	return NULL;
- }
- 
+}
  
- void linphone_chat_room_destroy(LinphoneChatRoom *cr){
+/**
+ * Destroy a LinphoneChatRoom.
+ * @param cr #LinphoneChatRoom object
+ */
+void linphone_chat_room_destroy(LinphoneChatRoom *cr){
 	LinphoneCore *lc=cr->lc;
 	lc->chatrooms=ms_list_remove(lc->chatrooms,(void *) cr);
 	linphone_address_destroy(cr->peer_url);
 	ms_free(cr->peer);
- }
-
+}
 
 static void _linphone_chat_room_send_message(LinphoneChatRoom *cr, LinphoneChatMessage* msg){
 	const char *route=NULL;
@@ -56,7 +69,7 @@ static void _linphone_chat_room_send_message(LinphoneChatRoom *cr, LinphoneChatM
 	LinphoneCall *call;
 	char* content_type;
 	
-	if (lp_config_get_int(cr->lc->config,"sip","chat_use_call_dialogs",1)){
+	if (lp_config_get_int(cr->lc->config,"sip","chat_use_call_dialogs",0)){
 		if((call = linphone_core_get_call_by_remote_address(cr->lc,cr->peer))!=NULL){
 			if (call->state==LinphoneCallConnected ||
 			call->state==LinphoneCallStreamsRunning ||
@@ -74,21 +87,30 @@ static void _linphone_chat_room_send_message(LinphoneChatRoom *cr, LinphoneChatM
 		op = sal_op_new(cr->lc->sal);
 		sal_op_set_route(op,route);
 		sal_op_set_user_pointer(op, msg); /*if out of call, directly store msg*/
+		if (msg->custom_headers){
+			sal_op_set_custom_header(op,msg->custom_headers);
+			msg->custom_headers=NULL; /*transfered to the SalOp*/
+		}
 	}
 	if (msg->external_body_url) {
 		content_type=ms_strdup_printf("message/external-body; access-type=URL; URL=\"%s\"",msg->external_body_url);
-		sal_message_send(op,identity,cr->peer,content_type,NULL);
+		sal_message_send(op,identity,cr->peer,content_type, NULL);
 		ms_free(content_type);
 	} else {
-		sal_text_send(op, identity, cr->peer, msg->message);
+		sal_text_send(op, identity, cr->peer,msg->message);
 	}
-	
-	
 }
 
+/**
+ * Send a message to peer member of this chat room.
+ * @deprecated linphone_chat_room_send_message2() gives more control on the message expedition.
+ * @param cr #LinphoneChatRoom object
+ * @param msg message to be sent
+ */
 void linphone_chat_room_send_message(LinphoneChatRoom *cr, const char *msg) {
 	_linphone_chat_room_send_message(cr,linphone_chat_room_create_message(cr,msg));
 }
+
 bool_t linphone_chat_room_matches(LinphoneChatRoom *cr, const LinphoneAddress *from){
 	if (linphone_address_get_username(cr->peer_url) && linphone_address_get_username(from) && 
 		strcmp(linphone_address_get_username(cr->peer_url),linphone_address_get_username(from))==0) return TRUE;
@@ -103,12 +125,14 @@ void linphone_chat_room_message_received(LinphoneChatRoom *cr, LinphoneCore *lc,
 	
 }
 
-void linphone_core_message_received(LinphoneCore *lc, const SalMessage *sal_msg){
+void linphone_core_message_received(LinphoneCore *lc, SalOp *op, const SalMessage *sal_msg){
 	MSList *elem;
 	LinphoneChatRoom *cr=NULL;
 	LinphoneAddress *addr;
 	char *cleanfrom;
 	LinphoneChatMessage* msg;
+	const SalCustomHeader *ch;
+	
 	addr=linphone_address_new(sal_msg->from);
 	linphone_address_clean(addr);
 	for(elem=lc->chatrooms;elem!=NULL;elem=ms_list_next(elem)){
@@ -126,6 +150,8 @@ void linphone_core_message_received(LinphoneCore *lc, const SalMessage *sal_msg)
 	msg = linphone_chat_room_create_message(cr, sal_msg->text);
 	linphone_chat_message_set_from(msg, cr->peer_url);
 	msg->time=sal_msg->time;
+	ch=sal_op_get_custom_header(op);
+	if (ch) msg->custom_headers=sal_custom_header_clone(ch);
 	
 	if (sal_msg->url) {
 		linphone_chat_message_set_external_body_url(msg, sal_msg->url);
@@ -135,37 +161,66 @@ void linphone_core_message_received(LinphoneCore *lc, const SalMessage *sal_msg)
 	ms_free(cleanfrom);
 }
 
+/**
+ * Returns back pointer to LinphoneCore object.
+**/
 LinphoneCore* linphone_chat_room_get_lc(LinphoneChatRoom *cr){
 	return cr->lc;
 }
 
-LinphoneChatRoom* linphone_chat_message_get_chat_room(LinphoneChatMessage *msg){
-	return msg->chat_room;
-}
-
+/**
+ * Assign a user pointer to the chat room.
+**/
 void linphone_chat_room_set_user_data(LinphoneChatRoom *cr, void * ud){
 	cr->user_data=ud;
 }
+
+/**
+ * Retrieve the user pointer associated with the chat room.
+**/
 void * linphone_chat_room_get_user_data(LinphoneChatRoom *cr){
 	return cr->user_data;
 }
+
+/**
+ * get peer address \link linphone_core_create_chat_room() associated to \endlink this #LinphoneChatRoom
+ * @param cr #LinphoneChatRoom object
+ * @return #LinphoneAddress peer address
+ */
 const LinphoneAddress* linphone_chat_room_get_peer_address(LinphoneChatRoom *cr) {
 	return cr->peer_url;
 }
 
-LinphoneChatMessage* linphone_chat_room_create_message(const LinphoneChatRoom *cr,const char* message) {
+/**
+ * Create a message attached to a dedicated chat room;
+ * @param cr the chat room.
+ * @param message text message, NULL if absent.
+ * @return a new #LinphoneChatMessage
+ */
+LinphoneChatMessage* linphone_chat_room_create_message(LinphoneChatRoom *cr, const char* message) {
 	LinphoneChatMessage* msg = ms_new0(LinphoneChatMessage,1);
 	msg->chat_room=(LinphoneChatRoom*)cr;
 	msg->message=message?ms_strdup(message):NULL;
 	return msg;
 }
 
-void linphone_chat_room_send_message2(LinphoneChatRoom *cr, LinphoneChatMessage* msg,LinphoneChatMessageStateChangeCb status_cb,void* ud) {
+/**
+ * Send a message to peer member of this chat room.
+ * @param cr #LinphoneChatRoom object
+ * @param msg #LinphoneChatMessage message to be sent
+ * @param status_cb LinphoneChatMessageStateChangeCb status callback invoked when message is delivered or could not be delivered. May be NULL
+ * @param ud user data for the status cb.
+ * @note The LinphoneChatMessage must not be destroyed until the the callback is called.
+ */
+void linphone_chat_room_send_message2(LinphoneChatRoom *cr, LinphoneChatMessage* msg,LinphoneChatMessageStateChangeCb status_cb, void* ud) {
 	msg->cb=status_cb;
 	msg->cb_ud=ud;
 	_linphone_chat_room_send_message(cr, msg);
 }
 
+/**
+ * Returns a #LinphoneChatMessageState as a string.
+ */
 const char* linphone_chat_message_state_to_string(const LinphoneChatMessageState state) {
 	switch (state) {
 		case LinphoneChatMessageStateIdle:return "LinphoneChatMessageStateIdle"; 
@@ -177,62 +232,112 @@ const char* linphone_chat_message_state_to_string(const LinphoneChatMessageState
 	
 }
 
-char* linphone_chat_message_get_message(LinphoneChatMessage* msg) {
-	return msg->message;
+/**
+ * Returns the chatroom this message belongs to.
+**/
+LinphoneChatRoom* linphone_chat_message_get_chat_room(LinphoneChatMessage *msg){
+	return msg->chat_room;
 }
 
+/**
+ * Returns the peer (remote) address for the message.
+**/
 const LinphoneAddress* linphone_chat_message_get_peer_address(LinphoneChatMessage *msg) {
 	return linphone_chat_room_get_peer_address(msg->chat_room);
 }
 
 /**
- * user pointer set function
+ *User pointer set function
  */
 void linphone_chat_message_set_user_data(LinphoneChatMessage* message,void* ud) {
 	message->message_userdata=ud;
 }
+
 /**
- * user pointer get function
+ * User pointer get function
  */
 void* linphone_chat_message_get_user_data(const LinphoneChatMessage* message) {
 	return message->message_userdata;
 }
 
+/**
+ * Linphone message can carry external body as defined by rfc2017
+ * @param message #LinphoneChatMessage
+ * @return external body url or NULL if not present.
+ */
 const char* linphone_chat_message_get_external_body_url(const LinphoneChatMessage* message) {
 	return message->external_body_url;
 }
 
+/**
+ * Linphone message can carry external body as defined by rfc2017
+ * 
+ * @param message a LinphoneChatMessage  
+ * @param url ex: access-type=URL; URL="http://www.foo.com/file"
+ */
 void linphone_chat_message_set_external_body_url(LinphoneChatMessage* message,const char* url) {
 	if (message->external_body_url) {
 		ms_free(message->external_body_url);
 	}
 	message->external_body_url=url?ms_strdup(url):NULL;
 }
+
+/**
+ * Set origin of the message
+ *@param message #LinphoneChatMessage obj
+ *@param from #LinphoneAddress origin of this message (copied)
+ */
 void linphone_chat_message_set_from(LinphoneChatMessage* message, const LinphoneAddress* from) {
 	if(message->from) linphone_address_destroy(message->from);
 	message->from=linphone_address_clone(from);
-	
 }
+
+/**
+ * Get origin of the message 
+ *@param message #LinphoneChatMessage obj
+ *@return #LinphoneAddress
+ */
 LinphoneAddress* linphone_chat_message_get_from(const LinphoneChatMessage* message) {
 	return message->from;
 }
 
+/**
+ * Get the time the message was sent.
+ */
 time_t linphone_chat_message_get_time(const LinphoneChatMessage* message) {
 	return message->time;
 }
 
+/**
+ * Get text part of this message
+ * @return text or NULL if no text.
+ */
 const char * linphone_chat_message_get_text(const LinphoneChatMessage* message) {
 	return message->message;
 }
 
+/**
+ * Add custom headers to the message.
+ * @param message the message
+ * @param header_name name of the header_name
+ * @param header_value header value
+**/
 void linphone_chat_message_add_custom_header(LinphoneChatMessage* message, const char *header_name, const char *header_value){
 	message->custom_headers=sal_custom_header_append(message->custom_headers,header_name,header_value);
 }
 
+/**
+ * Retrieve a custom header value given its name.
+ * @param message the message
+ * @param header_name header name searched
+**/
 const char * linphone_chat_message_get_custom_header(LinphoneChatMessage* message, const char *header_name){
 	return sal_custom_header_find(message->custom_headers,header_name);
 }
 
+/**
+ * Duplicate a LinphoneChatMessage
+**/
 LinphoneChatMessage* linphone_chat_message_clone(const LinphoneChatMessage* msg) {
 	/*struct _LinphoneChatMessage {
 	 char* message;
@@ -253,6 +358,9 @@ LinphoneChatMessage* linphone_chat_message_clone(const LinphoneChatMessage* msg)
 	return new_message;
 }
 
+/**
+ * Destroys a LinphoneChatMessage.
+**/
 void linphone_chat_message_destroy(LinphoneChatMessage* msg) {
 	if (msg->message) ms_free(msg->message);
 	if (msg->external_body_url) ms_free(msg->external_body_url);
@@ -262,3 +370,8 @@ void linphone_chat_message_destroy(LinphoneChatMessage* msg) {
 }
 
 
+/**
+ * @}
+ */
+
+
diff --git a/coreapi/linphonecore.h b/coreapi/linphonecore.h
index 08c4f89ee26eb67aedabcb0fb3e432bde19c06fd..f0b6f3d56872081ac5aedb077a264e4053772bcf 100644
--- a/coreapi/linphonecore.h
+++ b/coreapi/linphonecore.h
@@ -644,37 +644,6 @@ typedef struct _LinphoneChatMessage LinphoneChatMessage;
  */
 typedef struct _LinphoneChatRoom LinphoneChatRoom;
 
-/**
- * Create a new chat room for messaging from a sip uri like sip:joe@sip.linphone.org
- * @param lc #LinphoneCore object
- * @param to destination address for messages
- * @return #LinphoneChatRoom where messaging can take place.
- */
-LinphoneChatRoom * linphone_core_create_chat_room(LinphoneCore *lc, const char *to);
-/**
- * Destructor
- * @param cr #LinphoneChatRoom object
- */
-void linphone_chat_room_destroy(LinphoneChatRoom *cr);
-
-/**
- * create a message attached to a dedicated chat room;
- */
-LinphoneChatMessage* linphone_chat_room_create_message(const LinphoneChatRoom *cr,const char* message);
-
-
-/**
- * get peer address \link linphone_core_create_chat_room() associated to \endlink this #LinphoneChatRoom
- * @param cr #LinphoneChatRoom object
- * @return #LinphoneAddress peer address
- */
-const LinphoneAddress* linphone_chat_room_get_peer_address(LinphoneChatRoom *cr);
-/**
- * send a message to peer member of this chat room.
- * @param cr #LinphoneChatRoom object
- * @param msg message to be sent
- */
-void linphone_chat_room_send_message(LinphoneChatRoom *cr, const char *msg);
 /**
  *LinphoneChatMessageState is used to notify if messages have been succesfully delivered or not.
  */
@@ -685,90 +654,38 @@ typedef enum _LinphoneChatMessageStates {
 	LinphoneChatMessageStateNotDelivered /**<message was not delivered*/
 }LinphoneChatMessageState;
 
-	
 /**
- * to string function
+ * Call back used to notify message delivery status
+ *@param msg #LinphoneChatMessage object
+ *@param status LinphoneChatMessageState
+ *@param ud application user data
  */
-const char* linphone_chat_message_state_to_string(const LinphoneChatMessageState state);
+typedef void (*LinphoneChatMessageStateChangeCb)(LinphoneChatMessage* msg,LinphoneChatMessageState state,void* ud);
 
-/**
- * Clone a chat message 
- *@param message #LinphoneChatMessage obj
- *@return #LinphoneChatMessage
- */
+LinphoneChatRoom * linphone_core_create_chat_room(LinphoneCore *lc, const char *to);
+void linphone_chat_room_destroy(LinphoneChatRoom *cr);
+LinphoneChatMessage* linphone_chat_room_create_message(LinphoneChatRoom *cr,const char* message);
+const LinphoneAddress* linphone_chat_room_get_peer_address(LinphoneChatRoom *cr);
+void linphone_chat_room_send_message(LinphoneChatRoom *cr, const char *msg);
+void linphone_chat_room_send_message2(LinphoneChatRoom *cr, LinphoneChatMessage* msg,LinphoneChatMessageStateChangeCb status_cb,void* ud);
+LinphoneCore* linphone_chat_room_get_lc(LinphoneChatRoom *cr);
+void linphone_chat_room_set_user_data(LinphoneChatRoom *cr, void * ud);
+void * linphone_chat_room_get_user_data(LinphoneChatRoom *cr);
+
+const char* linphone_chat_message_state_to_string(const LinphoneChatMessageState state);
 LinphoneChatMessage* linphone_chat_message_clone(const LinphoneChatMessage* message);
-/**
- * Set origin of the message
- *@param message #LinphoneChatMessage obj
- *@param from #LinphoneAddress origin of this message (copied)
- */
 void linphone_chat_message_set_from(LinphoneChatMessage* message, const LinphoneAddress* from);
-
-/**
- * Get origin of the message 
- *@param message #LinphoneChatMessage obj
- *@return #LinphoneAddress
- */
 LinphoneAddress* linphone_chat_message_get_from(const LinphoneChatMessage* message);
-	
-/**
- * Linphone message can carry external body as defined by rfc2017
- * @param message #LinphoneChatMessage
- * @return external body url or NULL if not present.
- */
 const char* linphone_chat_message_get_external_body_url(const LinphoneChatMessage* message);
-	
-/**
- * Linphone message can carry external body as defined by rfc2017
- * 
- * @param message a LinphoneChatMessage  
- * @param url ex: access-type=URL; URL="http://www.foo.com/file"
- */
 void linphone_chat_message_set_external_body_url(LinphoneChatMessage* message,const char* url);
-
-/**
- * Get text part of this message
- * @return text or NULL if no text.
- */
 const char * linphone_chat_message_get_text(const LinphoneChatMessage* message);
-
-/**
- * Get the time the message was sent
- * @return time_t or NULL if no time
- */
 time_t linphone_chat_message_get_time(const LinphoneChatMessage* message);
-
-/**
- * user pointer get function
- */
-
 void* linphone_chat_message_get_user_data(const LinphoneChatMessage* message);
-/**
- * user pointer set function
- */
 void linphone_chat_message_set_user_data(LinphoneChatMessage* message,void*);
-	
-/**
- * Call back used to notify message delivery status
- *@param msg #LinphoneChatMessage object
- *@param status LinphoneChatMessageState
- *@param ud application user data
- */
-typedef void (*LinphoneChatMessageStateChangeCb)(LinphoneChatMessage* msg,LinphoneChatMessageState state,void* ud);
-/**
- * send a message to peer member of this chat room.
- * @param cr #LinphoneChatRoom object
- * @param msg #LinphoneChatMessage message to be sent
- * @param status_cb LinphoneChatMessageStateChangeCb status callback invoked when message is delivered or could not be delivered. May be NULL
- * @param ud user data for the status cb.
- */
-void linphone_chat_room_send_message2(LinphoneChatRoom *cr, LinphoneChatMessage* msg,LinphoneChatMessageStateChangeCb status_cb,void* ud);
-LinphoneCore* linphone_chat_room_get_lc(LinphoneChatRoom *cr);
 LinphoneChatRoom* linphone_chat_message_get_chat_room(LinphoneChatMessage *msg);
-char* linphone_chat_message_get_message(LinphoneChatMessage *msg);
 const LinphoneAddress* linphone_chat_message_get_peer_address(LinphoneChatMessage *msg);
-void linphone_chat_room_set_user_data(LinphoneChatRoom *cr, void * ud);
-void * linphone_chat_room_get_user_data(LinphoneChatRoom *cr);
+void linphone_chat_message_add_custom_header(LinphoneChatMessage* message, const char *header_name, const char *header_value);
+const char * linphone_chat_message_get_custom_header(LinphoneChatMessage* message, const char *header_name);
 
 /**
  * @}
diff --git a/coreapi/private.h b/coreapi/private.h
index b98995fa6cae873d32ced58ebdd00a01299e859f..1f3ed6abad1566f43f76f6392c5093169aee2947 100644
--- a/coreapi/private.h
+++ b/coreapi/private.h
@@ -302,7 +302,7 @@ void linphone_proxy_config_write_to_config_file(struct _LpConfig* config,Linphon
 
 int linphone_proxy_config_normalize_number(LinphoneProxyConfig *cfg, const char *username, char *result, size_t result_len);
 
-void linphone_core_message_received(LinphoneCore *lc, const SalMessage *msg);
+void linphone_core_message_received(LinphoneCore *lc, SalOp *op, const SalMessage *msg);
 
 void linphone_core_play_tone(LinphoneCore *lc);
 
diff --git a/coreapi/sal.c b/coreapi/sal.c
index e988a141bb9b5af1c79bdb8d5d819563679e9a6c..1411407a8350228f93d7ac3a324e6ef490c148c5 100644
--- a/coreapi/sal.c
+++ b/coreapi/sal.c
@@ -402,7 +402,7 @@ void sal_custom_header_free(SalCustomHeader *ch){
 	ms_list_free((MSList *)ch);
 }
 
-SalCustomHeader *sal_custom_header_clone(SalCustomHeader *ch){
+SalCustomHeader *sal_custom_header_clone(const SalCustomHeader *ch){
 	const MSList *it;
 	SalCustomHeader *ret=NULL;
 	for (it=(const MSList*)ch;it!=NULL;it=it->next){
diff --git a/coreapi/sal.h b/coreapi/sal.h
index 26efa81152850f22db507823233acfa435ef529c..25d8d20bcc38b2c58836a636a25d36d3c25d2443 100644
--- a/coreapi/sal.h
+++ b/coreapi/sal.h
@@ -465,7 +465,7 @@ struct SalCustomHeader{
 SalCustomHeader *sal_custom_header_append(SalCustomHeader *ch, const char *name, const char *value);
 const char *sal_custom_header_find(const SalCustomHeader *ch, const char *name);
 void sal_custom_header_free(SalCustomHeader *ch);
-SalCustomHeader *sal_custom_header_clone(SalCustomHeader *ch);
+SalCustomHeader *sal_custom_header_clone(const SalCustomHeader *ch);
 const SalCustomHeader *sal_op_get_custom_header(SalOp *op);
 void sal_op_set_custom_header(SalOp *op, SalCustomHeader* ch);
 
diff --git a/coreapi/sal_eXosip2_presence.c b/coreapi/sal_eXosip2_presence.c
index 4e0a9338d3441b93716925e9238eaaaa3d8e0024..1e49970bfd4a3d05c4f177100b731d5d7b1447f0 100644
--- a/coreapi/sal_eXosip2_presence.c
+++ b/coreapi/sal_eXosip2_presence.c
@@ -140,6 +140,7 @@ int sal_message_send(SalOp *op, const char *from, const char *to, const char* co
 	}
 	return 0;
 }
+
 int sal_text_send(SalOp *op, const char *from, const char *to, const char *msg) {
 	return sal_message_send(op,from,to,"text/plain",msg);
 }
diff --git a/gtk/calllogs.c b/gtk/calllogs.c
index 7dc82920a1689d8a7ad87f7529fda65bc3deecdd..4a9330f4affb0e1913c9fa815cd62d79e1128496 100644
--- a/gtk/calllogs.c
+++ b/gtk/calllogs.c
@@ -58,8 +58,8 @@ void linphone_gtk_call_log_update(GtkWidget *w){
 		gchar quality[20];
 		const char *status=NULL;
 		gchar *start_date=NULL;
-		time_t start_date_time=linphone_call_log_get_start_date(cl);
 		int duration=linphone_call_log_get_duration(cl);
+		time_t start_date_time=linphone_call_log_get_start_date(cl);
 		
 #if GLIB_CHECK_VERSION(2,26,0)
 		if (start_date_time){
@@ -67,6 +67,8 @@ void linphone_gtk_call_log_update(GtkWidget *w){
 			start_date=g_date_time_format(dt,"%c");
 			g_date_time_unref(dt);
 		}
+#else
+		start_date=g_strdup(ctime(start_date_time));
 #endif
 		
 		display=linphone_address_get_display_name (la);