<p>Also, sometimes I see this errors:</p>

<pre><code>ERROR:db_mysql:db_mysql_do_prepared_query: mysql_stmt_bind_param() failed: Using unsupported buffer type: -1027925224  (parameter: 3)
ERROR:db_mysql:db_mysql_do_prepared_query: param 0 was found as type 3 (null=0)
ERROR:presence:update_db_subs: deleting expired information from database
</code></pre>

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