You can change the code in /infolog/inc/class.infolog_hooks.inc.php, line 66 (in TRUNK), to not taking the implicit user preference into account, instead takes your preferred type of infolog, For Example:
‘type’ => ‘task’
instead of
‘type’ => $GLOBALS[‘egw_info’][‘user’][‘preferences’][‘preferred_type’]
And after the change you need to register hooks, and re-login.
Regards,
Hadi