W trybie debug mam coś takiego:
[10-Apr-2013 22:53:49] PHP Warning: Cannot modify header information – headers already sent by (output started at ../wp-config.php:1) in ../wp-login.php on line 368
[10-Apr-2013 22:53:49] PHP Warning: Cannot modify header information – headers already sent by (output started at ../wp-config.php:1) in ../wp-login.php on line 380
[10-Apr-2013 22:53:49] PHP Warning: Cannot modify header information – headers already sent by (output started at ../wp-config.php:1) in ../wp-includes/pluggable.php on line 680
[10-Apr-2013 22:53:49] PHP Warning: Cannot modify header information – headers already sent by (output started at ../wp-config.php:1) in ../wp-includes/pluggable.php on line 681
[10-Apr-2013 22:53:49] PHP Warning: Cannot modify header information – headers already sent by (output started at ../wp-config.php:1) in ../wp-includes/pluggable.php on line 682
[10-Apr-2013 22:53:49] PHP Warning: Cannot modify header information – headers already sent by (output started at ../wp-config.php:1) in ../wp-includes/pluggable.php on line 697
[10-Apr-2013 22:53:49] PHP Warning: Cannot modify header information – headers already sent by (output started at ../wp-config.php:1) in ../wp-includes/pluggable.php on line 698
[10-Apr-2013 22:53:49] PHP Warning: Cannot modify header information – headers already sent by (output started at ../wp-config.php:1) in ../wp-includes/pluggable.php on line 699
[10-Apr-2013 22:53:49] PHP Warning: Cannot modify header information – headers already sent by (output started at ../wp-config.php:1) in ../wp-includes/pluggable.php on line 700
[10-Apr-2013 22:53:49] PHP Warning: Cannot modify header information – headers already sent by (output started at ../wp-config.php:1) in ../wp-includes/pluggable.php on line 701
[10-Apr-2013 22:53:49] PHP Warning: Cannot modify header information – headers already sent by (output started at ../wp-config.php:1) in ../wp-includes/pluggable.php on line 702
[10-Apr-2013 22:53:49] PHP Warning: Cannot modify header information – headers already sent by (output started at ../wp-config.php:1) in ../wp-includes/pluggable.php on line 705
[10-Apr-2013 22:53:49] PHP Warning: Cannot modify header information – headers already sent by (output started at ../wp-config.php:1) in ../wp-includes/pluggable.php on line 706
[10-Apr-2013 22:53:49] PHP Warning: Cannot modify header information – headers already sent by (output started at ../wp-config.php:1) in ../wp-includes/pluggable.php on line 707
[10-Apr-2013 22:53:49] PHP Warning: Cannot modify header information – headers already sent by (output started at ../wp-config.php:1) in ../wp-includes/pluggable.php on line 708
[10-Apr-2013 22:53:49] PHP Warning: Cannot modify header information – headers already sent by (output started at ../wp-config.php:1) in ../wp-includes/pluggable.php on line 711
[10-Apr-2013 22:53:49] PHP Warning: Cannot modify header information – headers already sent by (output started at ../wp-config.php:1) in ../wp-includes/pluggable.php on line 712
[10-Apr-2013 22:53:49] PHP Warning: Cannot modify header information – headers already sent by (output started at ../wp-config.php:1) in ../wp-includes/pluggable.php on line 713
[10-Apr-2013 22:53:49] PHP Warning: Cannot modify header information – headers already sent by (output started at ../wp-config.php:1) in ../wp-includes/pluggable.php on line 714
[10-Apr-2013 22:53:49] PHP Warning: Cannot modify header information – headers already sent by (output started at ../wp-config.php:1) in ../wp-includes/pluggable.php on line 876