Still where it’s always been, in bp-core-buddybar.php. It’s included directly, so the only way you’re getting that error is if the file is incomplete, or was modified.
Thanks for getting back to me. The file is complete and unmodified.
The error was echo’d to the “Update Plugin” screen during update from v1.7.1 to 1.7.2. I was making use of the function in my functions.php to remove the mentions tab:
function remove_mention_nav() {
global $bp;
bp_core_remove_subnav_item( $bp->activity->slug, 'mentions' );
}
add_action( 'init', 'remove_mention_nav' );
I’ve not come across any problems since adding the function back to functions.php so perhaps it was just a glitch.