Ok, Well thanks but it still doesn't seem to work for my themes.
I am using Artisteer 4.0 themes. I added the line above you told me to add to the top and also tried adding add_filter( ‘wp_title’, ‘bp_modify_page_title’, 16, 3 ) to bp-custom.php and changing it directly in the core file.. I did not see any changes to my member profile titles.