the code below works fine in IE7 but not in firefox 3 the last sentence is cut.. it display only until "7. The quick brown fox"
what could be wrong? please help... thanks :)

.ws11 {font-size: 16px;}


<div id="text17" style="position:absolute; overflow:hidden; left:226px; top:165px; width:539px; height:144px; z-index:1"><div class="wpmd">
<div><font class="ws11"><B>March 2009</B></font></div>
<div><font class="ws11"><B><BR></B></font></div>
<UL>
<li><font class="ws11">1. The quick brown fox 2.The quick brown fox 3. The quick brown fox 4. The quick brown fox</font>
<BR><DIV></DIV><BR>
</UL>

</div></div><div id="text18" style="position:absolute; overflow:hidden; left:226px; top:275px; width:539px; height:144px; z-index:1"><div class="wpmd">
<div><font class="ws11"><B><BR></B></font></div>
<UL>
<font class="ws11">1. The quick brown fox 2.The quick brown fox 3. The quick brown fox 4. The quick brown fox 5. The quick brown fox 6.The quick brown fox 7. The quick brown fox 8. The quick brown fox</font>
</UL>