diff --git a/binlog.c b/binlog.c
index 7637430..2860157 100644
--- a/binlog.c
+++ b/binlog.c
@@ -616,6 +616,93 @@ void replay_log_event (void) {
       C->chat.users_num = *(rptr ++);
     };
     break;
+  case CODE_binlog_set_chat_admin:
+    rptr ++;
+    {
+      peer_t *C = user_chat_get (MK_CHAT (*(rptr ++)));
+      assert (C && (C->flags & FLAG_CREATED));
+      C->chat.admin_id = *(rptr ++);
+    };
+    break;
+  case CODE_binlog_set_chat_participants:
+    rptr ++;
+    {
+      peer_t *C = user_chat_get (MK_CHAT (*(rptr ++)));
+      assert (C && (C->flags & FLAG_CREATED));
+      C->chat.user_list_version = *(rptr ++);
+      C->chat.user_list_size = *(rptr ++);
+      if (C->chat.user_list) { free (C->chat.user_list); }
+      C->chat.user_list = malloc (12 * C->chat.user_list_size);
+      memcpy (C->chat.user_list, rptr, 12 * C->chat.user_list_size);
+      rptr += 3 * C->chat.user_list_size;
+    };
+    break;
+  case CODE_binlog_chat_full_photo:
+    in_ptr ++;
+    {
+      peer_id_t id = MK_CHAT (fetch_int ());
+      peer_t *U = user_chat_get (id);
+      assert (U && (U->flags & FLAG_CREATED));
+      if (U->flags & FLAG_HAS_PHOTO) {
+        free_photo (&U->chat.photo);
+      }
+      fetch_photo (&U->chat.photo);
+    }
+    rptr = in_ptr;
+    break;
+  case CODE_binlog_add_chat_participant:
+    rptr ++;
+    {
+      peer_id_t id = MK_CHAT (*(rptr ++));
+      peer_t *_C = user_chat_get (id);
+      assert (_C && (_C->flags & FLAG_CREATED));
+      struct chat *C = &_C->chat;
+
+      int version = *(rptr ++);
+      int user = *(rptr ++);
+      int inviter = *(rptr ++);
+      int date = *(rptr ++);
+      assert (C->user_list_version < version);
+
+      int i;
+      for (i = 0; i < C->user_list_size; i++) {
+        assert (C->user_list[i].user_id != user);
+      }
+      C->user_list_size ++;
+      C->user_list = realloc (C->user_list, 12 * C->user_list_size);
+      C->user_list[C->user_list_size - 1].user_id = user;
+      C->user_list[C->user_list_size - 1].inviter_id = inviter;
+      C->user_list[C->user_list_size - 1].date = date;
+      C->user_list_version = version;
+    }
+    break;
+  case CODE_binlog_del_chat_participant:
+    rptr ++;
+    {
+      peer_id_t id = MK_CHAT (*(rptr ++));
+      peer_t *_C = user_chat_get (id);
+      assert (_C && (_C->flags & FLAG_CREATED));
+      struct chat *C = &_C->chat;
+
+      int version = *(rptr ++);
+      int user = *(rptr ++);
+      assert (C->user_list_version < version);
+
+      int i;
+      for (i = 0; i < C->user_list_size; i++) {
+        if (C->user_list[i].user_id == user) {
+          struct chat_user t;
+          t = C->user_list[i];
+          C->user_list[i] = C->user_list[C->user_list_size - 1];
+          C->user_list[C->user_list_size - 1] = t;
+        }
+      }
+      assert (C->user_list[C->user_list_size - 1].user_id == user);
+      C->user_list_size --;
+      C->user_list = realloc (C->user_list, 12 * C->user_list_size);
+      C->user_list_version = version;
+    }
+    break;
   case CODE_update_user_photo:
   case CODE_update_user_name:
     work_update_binlog ();
@@ -1120,3 +1207,54 @@ void bl_do_set_chat_version (struct chat *C, int version, int user_num) {
   ev[3] = user_num;
   add_log_event (ev, 16);
 }
+
+void bl_do_set_chat_admin (struct chat *C, int admin) {
+  if (C->admin_id == admin) { return; }
+  int *ev = alloc_log_event (12);
+  ev[0] = CODE_binlog_set_chat_admin;
+  ev[1] = get_peer_id (C->id);
+  ev[2] = admin;
+  add_log_event (ev, 12);
+}
+
+void bl_do_set_chat_participants (struct chat *C, int version, int user_num, struct chat_user *users) {
+  if (C->user_list_version >= version) { return; }
+  int *ev = alloc_log_event (12 * user_num + 16);
+  ev[0] = CODE_binlog_set_chat_participants;
+  ev[1] = get_peer_id (C->id);
+  ev[2] = version;
+  ev[3] = user_num;
+  memcpy (ev + 4, users, 12 * user_num);
+  add_log_event (ev, 12 * user_num + 16);
+}
+
+void bl_do_set_chat_full_photo (struct chat *U, const int *start, int len) {
+  if (U->photo.id == *(long long *)(start + 1)) { return; }
+  int *ev = alloc_log_event (len + 8);
+  ev[0] = CODE_binlog_chat_full_photo;
+  ev[1] = get_peer_id (U->id);
+  memcpy (ev + 2, start, len);
+  add_log_event (ev, len + 8);
+}
+
+void bl_do_chat_add_user (struct chat *C, int version, int user, int inviter, int date) {
+  if (C->user_list_version >= version || !C->user_list_version) { return; }
+  int *ev = alloc_log_event (24);
+  ev[0] = CODE_binlog_add_chat_participant;
+  ev[1] = get_peer_id (C->id);
+  ev[2] = version;
+  ev[3] = user;
+  ev[4] = inviter;
+  ev[5] = date;
+  add_log_event (ev, 24);
+}
+
+void bl_do_chat_del_user (struct chat *C, int version, int user) {
+  if (C->user_list_version >= version || !C->user_list_version) { return; }
+  int *ev = alloc_log_event (16);
+  ev[0] = CODE_binlog_add_chat_participant;
+  ev[1] = get_peer_id (C->id);
+  ev[2] = version;
+  ev[3] = user;
+  add_log_event (ev, 16);
+}
diff --git a/binlog.h b/binlog.h
index b6e3cf3..02c7af5 100644
--- a/binlog.h
+++ b/binlog.h
@@ -46,7 +46,11 @@
 #define CODE_binlog_set_chat_photo 0xb4ea1fd2
 #define CODE_binlog_set_chat_date 0x78d1114e
 #define CODE_binlog_set_chat_version 0xa5d3504f
-
+#define CODE_binlog_set_chat_admin 0x1e7cea04
+#define CODE_binlog_set_chat_participants 0x3a29d335
+#define CODE_binlog_chat_full_photo 0x6cca6629
+#define CODE_binlog_add_chat_participant 0x63345108
+#define CODE_binlog_del_chat_participant 0x82d1f0ee
 
 void *alloc_log_event (int l);
 void replay_log (void);
@@ -93,4 +97,9 @@ void bl_do_set_chat_photo (struct chat *C, struct file_location *big, struct fil
 void bl_do_set_chat_date (struct chat *C, int date);
 void bl_do_set_chat_set_in_chat (struct chat *C, int on);
 void bl_do_set_chat_version (struct chat *C, int version, int user_num);
+void bl_do_set_chat_admin (struct chat *C, int admin);
+void bl_do_set_chat_participants (struct chat *C, int version, int user_num, struct chat_user *users);
+void bl_do_set_chat_full_photo (struct chat *U, const int *start, int len);
+void bl_do_chat_add_user (struct chat *C, int version, int user, int inviter, int date);
+void bl_do_chat_del_user (struct chat *C, int version, int user);
 #endif
diff --git a/mtproto-client.c b/mtproto-client.c
index fb7a40f..8e29dbb 100644
--- a/mtproto-client.c
+++ b/mtproto-client.c
@@ -701,7 +701,7 @@ void fetch_seq (void) {
   int x = fetch_int ();
   if (x > seq + 1) {
     logprintf ("Hole in seq: seq = %d, x = %d\n", seq, x);
-    //do_get_difference ();
+    do_get_difference ();
     //seq = x;
   } else if (x == seq + 1) {
     seq = x;
@@ -879,19 +879,18 @@ void work_update (struct connection *c UU, long long msg_id UU) {
     {
       peer_id_t user_id = MK_USER (fetch_int ());
       peer_t *UC = user_chat_get (user_id);
-      if (UC) {
+      if (UC && (UC->flags & FLAG_CREATED)) {
+        int l1 = prefetch_strlen ();
+        char *f = fetch_str (l1);
+        int l2 = prefetch_strlen ();
+        char *l = fetch_str (l2);
         struct user *U = &UC->user;
+        bl_do_set_user_name (U, f, l1, l, l2);
         print_start ();
         push_color (COLOR_YELLOW);
         print_date (time (0));
         printf (" User ");
         print_user_name (user_id, UC);
-        if (U->first_name) { free (U->first_name); }
-        if (U->last_name) { free (U->last_name); }
-        if (U->print_name) { free (U->print_name); }
-        U->first_name = fetch_str_dup ();
-        U->last_name = fetch_str_dup ();
-        U->print_name = create_print_name (U->id, U->first_name, U->last_name, 0, 0);
         printf (" changed name to ");
         print_user_name (user_id, UC);
         printf ("\n");
@@ -911,8 +910,25 @@ void work_update (struct connection *c UU, long long msg_id UU) {
       peer_id_t user_id = MK_USER (fetch_int ());
       peer_t *UC = user_chat_get (user_id);
       fetch_date ();
-      if (UC) {
+      if (UC && (UC->flags & FLAG_CREATED)) {
         struct user *U = &UC->user;
+        unsigned y = fetch_int ();
+        long long photo_id;
+        struct file_location big;
+        struct file_location small;
+        memset (&big, 0, sizeof (big));
+        memset (&small, 0, sizeof (small));
+        if (y == CODE_user_profile_photo_empty) {
+          photo_id = 0;
+          big.dc = -2;
+          small.dc = -2;
+        } else {
+          assert (y == CODE_user_profile_photo);
+          photo_id = fetch_long ();
+          fetch_file_location (&small);
+          fetch_file_location (&big);
+        }
+        bl_do_set_user_profile_photo (U, photo_id, &big, &small);
         
         print_start ();
         push_color (COLOR_YELLOW);
@@ -922,17 +938,6 @@ void work_update (struct connection *c UU, long long msg_id UU) {
         printf (" updated profile photo\n");
         pop_color ();
         print_end ();
-        unsigned y = fetch_int ();
-        if (y == CODE_user_profile_photo_empty) {
-          U->photo_id = 0;
-          U->photo_big.dc = -2;
-          U->photo_small.dc = -2;
-        } else {
-          assert (y == CODE_user_profile_photo);
-          U->photo_id = fetch_long ();
-          fetch_file_location (&U->photo_small);
-          fetch_file_location (&U->photo_big);
-        }
       } else {
         struct file_location t;
         unsigned y = fetch_int ();
@@ -981,14 +986,32 @@ void work_update (struct connection *c UU, long long msg_id UU) {
       assert (x == CODE_chat_participants || x == CODE_chat_participants_forbidden);
       peer_id_t chat_id = MK_CHAT (fetch_int ());
       int n = 0;
-      if (x == CODE_chat_participants) {
-        fetch_int (); // admin_id
-        assert (fetch_int () == CODE_vector);
-        int n = fetch_int ();
-        fetch_skip (n * 4);
-        fetch_int (); // version
-      }
       peer_t *C = user_chat_get (chat_id);
+      if (C && (C->flags & FLAG_CREATED)) {
+        if (x == CODE_chat_participants) {
+          bl_do_set_chat_admin (&C->chat, fetch_int ());
+          assert (fetch_int () == CODE_vector);
+          n = fetch_int ();
+          struct chat_user *users = malloc (12 * n);
+          int i;
+          for (i = 0; i < n; i++) {
+            assert (fetch_int () == (int)CODE_chat_participant);
+            users[i].user_id = fetch_int ();
+            users[i].inviter_id = fetch_int ();
+            users[i].date = fetch_int ();
+          }
+          int version = fetch_int (); 
+          bl_do_set_chat_participants (&C->chat, version, n, users);
+        }
+      } else {
+        if (x == CODE_chat_participants) {
+          fetch_int (); // admin_id
+          assert (fetch_int () == CODE_vector);
+          n = fetch_int ();
+          fetch_skip (n * 4);
+          fetch_int (); // version
+        }
+      }
       print_start ();
       push_color (COLOR_YELLOW);
       print_date (time (0));
@@ -1187,7 +1210,12 @@ void work_update (struct connection *c UU, long long msg_id UU) {
       peer_id_t chat_id = MK_CHAT (fetch_int ());
       peer_id_t user_id = MK_USER (fetch_int ());
       peer_id_t inviter_id = MK_USER (fetch_int ());
-      fetch_int (); // version
+      int  version = fetch_int (); 
+      
+      peer_t *C = user_chat_get (chat_id);
+      if (C && (C->flags & FLAG_CREATED)) {
+        bl_do_chat_add_user (&C->chat, version, get_peer_id (user_id), get_peer_id (inviter_id), time (0));
+      }
 
       print_start ();
       push_color (COLOR_YELLOW);
@@ -1207,7 +1235,12 @@ void work_update (struct connection *c UU, long long msg_id UU) {
     {
       peer_id_t chat_id = MK_CHAT (fetch_int ());
       peer_id_t user_id = MK_USER (fetch_int ());
-      fetch_int (); // version
+      int version = fetch_int ();
+      
+      peer_t *C = user_chat_get (chat_id);
+      if (C && (C->flags & FLAG_CREATED)) {
+        bl_do_chat_del_user (&C->chat, version, get_peer_id (user_id));
+      }
 
       print_start ();
       push_color (COLOR_YELLOW);
diff --git a/queries.c b/queries.c
index 5c72769..695cb25 100644
--- a/queries.c
+++ b/queries.c
@@ -1618,14 +1618,14 @@ int chat_info_on_answer (struct query *q UU) {
   print_chat_name (U->id, U);
   printf (" members:\n");
   int i;
-  for (i = 0; i < C->users_num; i++) {
+  for (i = 0; i < C->user_list_size; i++) {
     printf ("\t\t");
-    print_user_name (MK_USER (C->users[i].user_id), user_chat_get (MK_USER (C->users[i].user_id)));
+    print_user_name (MK_USER (C->user_list[i].user_id), user_chat_get (MK_USER (C->user_list[i].user_id)));
     printf (" invited by ");
-    print_user_name (MK_USER (C->users[i].inviter_id), user_chat_get (MK_USER (C->users[i].inviter_id)));
+    print_user_name (MK_USER (C->user_list[i].inviter_id), user_chat_get (MK_USER (C->user_list[i].inviter_id)));
     printf (" at ");
-    print_date_full (C->users[i].date);
-    if (C->users[i].user_id == C->admin_id) {
+    print_date_full (C->user_list[i].date);
+    if (C->user_list[i].user_id == C->admin_id) {
       printf (" admin");
     }
     printf ("\n");
@@ -2424,8 +2424,8 @@ int get_difference_on_answer (struct query *q UU) {
   get_difference_active = 0;
   unsigned x = fetch_int ();
   if (x == CODE_updates_difference_empty) {
-    fetch_date ();
-    fetch_seq ();
+    bl_do_set_date (fetch_int ());
+    bl_do_set_seq (fetch_int ());
     difference_got = 1;
   } else if (x == CODE_updates_difference || x == CODE_updates_difference_slice) {
     int n, i;
diff --git a/structures.c b/structures.c
index 4f7f064..a3cba31 100644
--- a/structures.c
+++ b/structures.c
@@ -34,14 +34,33 @@
 
 #define sha1 SHA1
 
+static int id_cmp (struct message *M1, struct message *M2);
+#define peer_cmp(a,b) (cmp_peer_id (a->id, b->id))
+DEFINE_TREE(peer,peer_t *,peer_cmp,0)
+DEFINE_TREE(message,struct message *,id_cmp,0)
+
+
+struct message message_list = {
+  .next_use = &message_list,
+  .prev_use = &message_list
+};
+
+struct tree_peer *peer_tree;
+struct tree_message *message_tree;
+
+int users_allocated;
+int chats_allocated;
+int messages_allocated;
+
+int our_id;
 int verbosity;
 peer_t *Peers[MAX_USER_NUM];
-
 int peer_num;
 int encr_chats_allocated;
 int geo_chats_allocated;
-
 extern int binlog_enabled;
+
+
 void fetch_skip_photo (void);
 
 #define code_assert(x) if (!(x)) { logprintf ("Can not parse at line %d\n", __LINE__); assert (0); return -1; }
@@ -98,8 +117,6 @@ int fetch_user_status (struct user_status *S) {
   return 0;
 }
 
-int our_id;
-
 char *create_print_name (peer_id_t id, const char *a1, const char *a2, const char *a3, const char *a4) {
   const char *d[4];
   d[0] = a1; d[1] = a2; d[2] = a3; d[3] = a4;
@@ -516,35 +533,32 @@ void fetch_chat_full (struct chat *C) {
   assert (x == CODE_messages_chat_full);
   assert (fetch_int () == CODE_chat_full); 
   C->id = MK_CHAT (fetch_int ());
-  C->flags &= ~(FLAG_DELETED | FLAG_FORBIDDEN | FLAG_CHAT_IN_CHAT);
-  C->flags |= FLAG_CREATED;
+  //C->flags &= ~(FLAG_DELETED | FLAG_FORBIDDEN | FLAG_CHAT_IN_CHAT);
+  //C->flags |= FLAG_CREATED;
   x = fetch_int ();
+  int version = 0;
+  struct chat_user *users = 0;
+  int users_num = 0;
+  int admin_id = 0;
+
   if (x == CODE_chat_participants) {
     assert (fetch_int () == get_peer_id (C->id));
-    C->admin_id =  fetch_int ();
+    admin_id =  fetch_int ();
     assert (fetch_int () == CODE_vector);
-    if (C->users) {
-      free (C->users);
-    }
-    C->users_num = fetch_int ();
-    C->users = malloc (sizeof (struct chat_user) * C->users_num);
+    users_num = fetch_int ();
+    users = malloc (sizeof (struct chat_user) * users_num);
     int i;
     for (i = 0; i < C->users_num; i++) {
       assert (fetch_int () == (int)CODE_chat_participant);
-      C->users[i].user_id = fetch_int ();
-      C->users[i].inviter_id = fetch_int ();
-      C->users[i].date = fetch_int ();
+      users[i].user_id = fetch_int ();
+      users[i].inviter_id = fetch_int ();
+      users[i].date = fetch_int ();
     }
-    C->version = fetch_int ();
-  } else {
-    C->flags |= FLAG_FORBIDDEN;
-    assert (x == CODE_chat_participants_forbidden);
+    version = fetch_int ();
   }
-  if (C->flags & FLAG_HAS_PHOTO) {
-    free_photo (&C->photo);
-  }
-  fetch_photo (&C->photo);
-  C->flags |= FLAG_HAS_PHOTO;
+  int *start = in_ptr;
+  fetch_skip_photo ();
+  int *end = in_ptr;
   fetch_notify_settings ();
 
   int n, i;
@@ -558,6 +572,14 @@ void fetch_chat_full (struct chat *C) {
   for (i = 0; i < n; i++) {
     fetch_alloc_user ();
   }
+  if (admin_id) {
+    bl_do_set_chat_admin (C, admin_id);
+  }
+  if (version > 0) {
+    bl_do_set_chat_participants (C, version, users_num, users);
+    free (users);
+  }
+  bl_do_set_chat_full_photo (C, start, 4 * (end - start));
 }
 
 void fetch_photo_size (struct photo_size *S) {
@@ -1019,8 +1041,8 @@ void fetch_geo_message (struct message *M) {
   }
 }
 
-int *decr_ptr;
-int *decr_end;
+static int *decr_ptr;
+static int *decr_end;
 
 int decrypt_encrypted_message (struct secret_chat *E) {
   int *msg_key = decr_ptr;
@@ -1180,22 +1202,6 @@ static int id_cmp (struct message *M1, struct message *M2) {
   else { return 0; }
 }
 
-#define peer_cmp(a,b) (cmp_peer_id (a->id, b->id))
-
-DEFINE_TREE(peer,peer_t *,peer_cmp,0)
-DEFINE_TREE(message,struct message *,id_cmp,0)
-struct tree_peer *peer_tree;
-struct tree_message *message_tree;
-
-int users_allocated;
-int chats_allocated;
-int messages_allocated;
-
-struct message message_list = {
-  .next_use = &message_list,
-  .prev_use = &message_list
-};
-
 struct user *fetch_alloc_user (void) {
   int data[2];
   prefetch_data (data, 8);
diff --git a/structures.h b/structures.h
index 415eea0..dc33ee2 100644
--- a/structures.h
+++ b/structures.h
@@ -172,7 +172,9 @@ struct chat {
   struct photo photo;
   char *title;
   int users_num;
-  struct chat_user *users;
+  int user_list_size;
+  int user_list_version;
+  struct chat_user *user_list;
   int date;
   int version;
   int admin_id;