PHP error: Call-time pass-by-reference has been deprecated

I tried a fresh Drupal install with no additional modules enabled, but PHP still complained about lines 39 and 249.

Drupal: 6.2
PHP: 5.2

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 /home/user/drupal6/sites/domain/modules/emfield/emfield.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 /home/user/drupal6/sites/domain/modules/emfield/emfield.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 /home/user/drupal6/sites/domain/modules/emfield/emfield.module on line 249