Hi,
I have had the same problem and now, I have found a solution which works with my theme: just declare the variable $data (or whatever name you give it) as static before calling bp_get_member_profile_data or bp_member_profile_data like this:
<?php static $data = 'bla'; ?>
<?php do_action( 'bp_directory_members_item' ); ?>
<?php
/***
* If you want to show specific profile fields here you can,
* but it'll add an extra query for each member in the loop
* (only one regardless of the number of fields you show):
*
* bp_member_profile_data( 'field=the field name' );
*/
$data = bp_get_member_profile_data( 'field=Taetigkeit' );
if( $data != '' )
echo $data;
?>
