Getting error in admin panel with BP-core after WP3.1 upgrade

Im having these errors in the admin panel with the buddpress core php after I upgraded to 3.1

Like when I edit the theme it wont refresh but will show the one below:
Warning: Cannot modify header information – headers already sent by (output started at /home4/popsicl2/public_html/wp-content/plugins/buddypress/bp-core/bp-core-cssjs.php:39) in /home4/popsicl2/public_html/wp-admin/theme-editor.php on line 99

and when I do other stuff like deleting members, posts I see same errors but different “line”