Bug 17946. Trees must be contained within a fixed div. r=hyatt, a=jack

mailnews/addrbook/resources/content/addressbook.xul

@@ -238,7 +238,7 @@ Rights Reserved.
 			<!-- results tree -->
 			<box id="results_box" flex="50%" align="vertical">
 				<!-- FIX ME - div is hack to make tree scroll properly -->
-				<html:div flex="1">
+				<html:div flex="1" style="width:100px; height:100px;">
 					<tree id="resultsTree"/>
 				</html:div>
 			</box>