BuddyPress.org

This happens a lot with PHP and has happened to me a lot with pluggable.php lately.

I’m not more than a novice with PHP, but the advice I’ve seen to fix it (and it worked for me) is to edit pluggable.php and make sure that the file begins with

<?php

with no blanks before it and ends with

?>

with no blanks after. I’m not sure why it goes wonky sometimes, but it seems to.

Edit: Before mucking around, though, you’d better wait for confirmation from someone better informed than I, just in case, if you can.