Using code from trunk, iCMS 1.2.3 on PHP 5.3

1.- installing the module, debug:
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/class/art/functions.ini.php line 90
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/include/functions.php line 431
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/include/functions.php line 446
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/class/art/object.php line 145
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/class/art/object.persistable.php line 272
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/class/post.php line 1023
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/class/topic.php line 183
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/class/topic.php line 417

2.- changing permissions
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/class/art/functions.ini.php line 90
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/include/functions.php line 431
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/include/functions.php line 446
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/class/art/object.php line 145
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/class/art/object.persistable.php line 272
Notice: Use of undefined constant _AM_IFORUM_PERM_PERMISSIONS - assumed '_AM_IFORUM_PERM_PERMISSIONS' in file /modules/iforum/admin/admin_permissions.php line 184

3.- phpdebug (no iCMS debug) looking a forum

Deprecated: Assigning the return value of new by reference is deprecated in /server/modules/iforum/viewforum.php on line 145

4.- posting as anonymous: fails
_US_SORRYNOTFOUND and redirect to Error 404 (I believe that it is a problem on PHP 5.2 too)

5.- Reading a thread:
Advertencia: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /modules/iforum/viewtopic.php:741) in file /include/common.php line 283
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/class/art/functions.ini.php line 90
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/include/functions.php line 431
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/include/functions.php line 446
Advertencia: Cannot modify header information - headers already sent by (output started at /modules/iforum/viewtopic.php:741) in file /modules/iforum/include/functions.php line 212
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/class/art/object.php line 145
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/class/art/object.persistable.php line 272
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/class/topic.php line 183
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/class/topic.php line 417
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/class/post.php line 1023
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/class/readtopic.php line 100
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/class/readtopic.php line 136
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/class/readtopic.php line 140
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/class/readtopic.php line 148
Unknown: Assigning the return value of new by reference is deprecated in file /modules/iforum/class/user.php line 83