I'm getting an error on my site regarding "headers already sent":
Warning: Cannot modify header information - headers already sent by (output started at ........./wp-admin/menu-header.php:161) in ....../wp-includes/pluggable.php on line 881
I read the Wordpress FAQ that discusses this, but - as you can see - this error is caused by the Wordpress core (and not even at the end of a file).
Interestingly, I don't get this error on my local machine. Only on my server.
What can I do about this?
I'm running Wordpress 3.4.2