Weird Advanced Forum bug.

Something is wrong with 5.x version of Four Season theme and Advanced Forum module collaboration ( http://drupal.org/project/advanced_forum ). 6.x seems to be working fine. I'm running Web Developer Suite locally. There's these lines above header:

Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in C:\www\webapps\joomla\sites\all\modules\advanced_forum\advanced_forum.module on line 39

Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in C:\www\webapps\joomla\sites\all\modules\advanced_forum\advanced_forum.module on line 42

Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in C:\www\webapps\joomla\sites\all\modules\advanced_forum\advanced_forum.module on line 159

Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in C:\www\webapps\joomla\sites\all\modules\advanced_forum\advanced_forum.module on line 312

Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in C:\www\webapps\joomla\sites\all\modules\advanced_forum\advanced_forum.module on line 315

Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in C:\www\webapps\joomla\sites\all\modules\advanced_forum\advanced_forum.module on line 360

Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in C:\www\webapps\joomla\sites\all\modules\advanced_forum\advanced_forum.module on line 363

Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in C:\www\webapps\joomla\sites\all\modules\advanced_forum\advanced_forum.module on line 399

Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in C:\www\webapps\joomla\sites\all\modules\advanced_forum\advanced_forum.module on line 402

Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in C:\www\webapps\joomla\sites\all\modules\advanced_forum\advanced_forum.module on line 493

Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in C:\www\webapps\joomla\sites\all\modules\advanced_forum\advanced_forum.module on line 525

Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in C:\www\webapps\joomla\sites\all\modules\advanced_forum\advanced_forum.module on line 528