Headers already sent error; only on remote host

Hi! I’ve been working on a site for a while on my localhost. When I turn the debug on, everything seems to work okay aside for a few notices.

However, when I put it online and I log in to the site (which uses BuddyPress) I get the following errors:

Warning: Cannot modify header information – headers already sent by (output started at /home/vhosts/terinova.net/httpdocs/mediawise/wp-includes/functions.php:3560) in /home/vhosts/terinova.net/httpdocs/mediawise/wp-includes/option.php on line 772

Warning: Cannot modify header information – headers already sent by (output started at /home/vhosts/terinova.net/httpdocs/mediawise/wp-includes/functions.php:3560) in /home/vhosts/terinova.net/httpdocs/mediawise/wp-includes/option.php on line 773

Does anybody know what’s going on and what I can do to fix this?