BuddyPress.org

hello guys i am succesfully installed buddypress on my test site and i works like a charm.. i just have aproblem with my sidebar widget.. i dont know how to explain but i can show the picture here

http://img196.imageshack.us/img196/3843/problemci.png

how to remove that dot next to my sidebar header.. every sidebar header will have that dot.

or another option what is the tag (codex) to display registered members with avatar in the sidebar. let say i want to display 20 registered members ..