Remove bullets from widget titles (or fields)

I would like to remove the bullets that appear in front of each widget in the right sidebar, even the text ones. They are partly displayed in Firefox, or in IE on a 15″ lcd.

Using Mandigo theme, I’ve looked through the style.css.php a hundred times, and dont know where else to go.

I would also like to reduce the left margin in the sidebar.

Any help would be appreciated.