--- expressoMail1_2/js/search.js	2011-07-25 13:41:02.000000000 -0300
+++ expressoMail1_2/js/search_alt.js	2011-07-25 13:40:03.000000000 -0300
@@ -401,7 +401,8 @@
 		for( var i=0; i < data.length; i++)
 		{
 			var tr = document.createElement("TR");
-				tr.style.height = preferences.line_height;
+	                if(typeof(preferences.line_height) != 'undefined')
+        	                tr_element.style.height = preferences.line_height;
 			
 			var aux = data[i];
 			var mailbox = aux.boxname;