lucy24 - 11:36 pm on Nov 5, 2011 (gmt 0)

The <br> or <br /> or <p> or whatever you use has to be inside the preceding or following <li> unless you open and close the whole <ul>. (Lists behave like tables in this respect. They're a closed system ;))

Or you could say something like

li.break {margin-bottom: 1em;}