I hope I've fixed all the bugs by now, let's test it

sql/log_event.h:
  changed new/delete for Log_event to use my_malloc/my_free
sql/mysql_priv.h:
  wait for slave to get going
sql/mysqld.cc:
  wait for slave to get going in SLAVE START
sql/slave.cc:
  fixed more memory leaks
sql/sql_repl.cc:
  file name was not being \0 terminated in send_file

sql/log_event.h

@@ -65,6 +65,16 @@ class Log_event
   int valid_exec_time; // if false, the exec time setting is bogus 
   uint32 server_id;
 
+  static void *operator new(size_t size)
+  {
+    return (void*) my_malloc((uint)size, MYF(MY_WME|MY_FAE));
+  }
+
+  static void operator delete(void *ptr, size_t size)
+  {
+    my_free((byte*)ptr, MYF(MY_WME|MY_ALLOW_ZERO_PTR));
+  }
+  
   int write(IO_CACHE* file);
   int write_header(IO_CACHE* file);
   virtual int write_data(IO_CACHE* file __attribute__((unused))) { return 0; }

sql/mysql_priv.h

@@ -486,7 +486,7 @@ extern pthread_mutex_t LOCK_mysql_create_db,LOCK_Acl,LOCK_open,
        LOCK_delayed_status, LOCK_delayed_create, LOCK_crypt, LOCK_timezone,
        LOCK_binlog_update, LOCK_slave, LOCK_server_id;
 extern pthread_cond_t COND_refresh,COND_thread_count, COND_binlog_update,
-  COND_slave_stopped;
+  COND_slave_stopped, COND_slave_start;
 extern pthread_attr_t connection_attrib;
 extern bool opt_endinfo,using_udf_functions, locked_in_memory;
 extern ulong ha_read_count, ha_write_count, ha_delete_count, ha_update_count,

sql/mysqld.cc

@@ -263,7 +263,7 @@ pthread_mutex_t LOCK_mysql_create_db, LOCK_Acl, LOCK_open, LOCK_thread_count,
                 LOCK_binlog_update, LOCK_slave, LOCK_server_id;
 
 pthread_cond_t COND_refresh,COND_thread_count,COND_binlog_update,
-  COND_slave_stopped;
+  COND_slave_stopped, COND_slave_start;
 pthread_cond_t COND_thread_cache,COND_flush_thread_cache;
 pthread_t signal_thread;
 pthread_attr_t connection_attrib;
@@ -1414,6 +1414,7 @@ int main(int argc, char **argv)
   (void) pthread_mutex_init(&LOCK_server_id, NULL);
   (void) pthread_cond_init(&COND_binlog_update, NULL);
   (void) pthread_cond_init(&COND_slave_stopped, NULL);
+  (void) pthread_cond_init(&COND_slave_start, NULL);
 
   if (set_default_charset_by_name(default_charset, MYF(MY_WME)))
     unireg_abort(1);

sql/slave.cc

@@ -938,8 +938,8 @@ static int exec_event(THD* thd, NET* net, MASTER_INFO* mi, int event_len)
 	return 1;
       }
       
-      free_root(&thd->mem_root,0);
       delete ev;
+      free_root(&thd->mem_root,0);
 	    
       if(thd->fatal_error)
       {
@@ -957,12 +957,14 @@ static int exec_event(THD* thd, NET* net, MASTER_INFO* mi, int event_len)
       close_temporary_tables(thd);
       mi->inc_pos(event_len);
       flush_master_info(mi);
+      delete ev;
       break;
                   
     case STOP_EVENT:
       close_temporary_tables(thd);
       mi->inc_pos(event_len);
       flush_master_info(mi);
+      delete ev;
       break;
     case ROTATE_EVENT:
     {
@@ -1013,15 +1015,18 @@ pthread_handler_decl(handle_slave,arg __attribute__((unused)))
   THD *thd; // needs to be first for thread_stack
   MYSQL *mysql = NULL ;
 
+  pthread_mutex_lock(&LOCK_slave);
   if(!server_id)
     {
+     pthread_cond_broadcast(&COND_slave_start);
+     pthread_mutex_unlock(&LOCK_slave);
      sql_print_error("Server id not set, will not start slave");
      pthread_exit((void*)1);
     }
   
-  pthread_mutex_lock(&LOCK_slave);
   if(slave_running)
     {
+      pthread_cond_broadcast(&COND_slave_start);
       pthread_mutex_unlock(&LOCK_slave);
       pthread_exit((void*)1);  // safety just in case
     }
@@ -1030,6 +1035,7 @@ pthread_handler_decl(handle_slave,arg __attribute__((unused)))
 #ifndef DBUG_OFF  
   events_till_abort = abort_slave_event_count;
 #endif  
+ pthread_cond_broadcast(&COND_slave_start);
  pthread_mutex_unlock(&LOCK_slave);
   
   int error = 1;

sql/sql_repl.cc

@@ -34,7 +34,7 @@ static int send_file(THD *thd)
   char fname[FN_REFLEN+1];
   char *buf;
   const char *errmsg = 0;
-  int old_timeout;
+  int old_timeout,fname_len;
   DBUG_ENTER("send_file");
 
   // the client might be slow loading the data, give him wait_timeout to do
@@ -51,12 +51,14 @@ static int send_file(THD *thd)
 
   // we need net_flush here because the client will not know it needs to send
   // us the file name until it has processed the load event entry
-  if (net_flush(net) || my_net_read(net) == packet_error)
+  if (net_flush(net) || (fname_len = my_net_read(net)) == packet_error)
   {
     errmsg = "Failed reading file name";
     goto err;
   }
 
+  *((char*)net->read_pos + 1 + fname_len) = 0; // terminate with \0
+   //for fn_format
   fn_format(fname, (char*)net->read_pos + 1, "", "", 4);
   // this is needed to make replicate-ignore-db
   if (!strcmp(fname,"/dev/null"))
@@ -513,6 +515,7 @@ int start_slave(THD* thd , bool net_report)
 	    {
 	      err = "cannot create slave thread";
 	    }
+	  pthread_cond_wait(&COND_slave_start, &LOCK_slave);
 	}
       else
 	err = "Master host not set, or server id not configured";