BuddyPress.org

Hi,
I have a buddypress forum (not bbpress). After lot of errors while posting topics (blank posts), I discovered that this is due to IPV6 IP users : when posting, Buddypress save the IP in poster_ip field (wp_bb_posts table). This field is varchar(15) so I changed it to varchar(30) to solve my issues.
It’s working well but sometimes it’s going back itself to varchar(15).
3 questions :
1. Is it possible to change to varchar(15) in trunk for next BP versions ?
2. What function in BP or WP is making back to varchar(15) ?
3. Is there another way to fix this IPV6 issue ?

Thanks