diff --git a/mailnews/addrbook/resources/content/abDirTreeOverlay.xul b/mailnews/addrbook/resources/content/abDirTreeOverlay.xul
index 0d056810504..359cd04cb24 100644
--- a/mailnews/addrbook/resources/content/abDirTreeOverlay.xul
+++ b/mailnews/addrbook/resources/content/abDirTreeOverlay.xul
@@ -33,7 +33,9 @@ Rights Reserved.
 		  ref="abdirectory://"
 		  datasources="rdf:addressdirectory"
 		  onselect="DirPaneSelectionChange(); document.commandDispatcher.updateCommands('tree-select');"
-		  onblur="goOnEvent(this,'blur')">
+		  onblur="goOnEvent(this,'blur')"
+		  allownegativeassertions="false"
+          coalesceduplicatearcs="false">
 		
 		<template>
 			<rule>
diff --git a/mailnews/addrbook/resources/content/abResultsTreeOverlay.xul b/mailnews/addrbook/resources/content/abResultsTreeOverlay.xul
index 8d1a42c1950..67b2b7f6c86 100644
--- a/mailnews/addrbook/resources/content/abResultsTreeOverlay.xul
+++ b/mailnews/addrbook/resources/content/abResultsTreeOverlay.xul
@@ -34,7 +34,9 @@ Rights Reserved.
 		  onselect="top.ResultsPaneSelectionChange(); document.commandDispatcher.updateCommands('tree-select');"
 		  onblur="goOnEvent(this,'blur')"
 		  ondblclick="top.AbEditCard()"
-		  containment="http://home.netscape.com/NC-rdf#CardChild">
+		  containment="http://home.netscape.com/NC-rdf#CardChild"
+		  allownegativeassertions="false"
+          coalesceduplicatearcs="false">
 
 		<template>
 			<rule>
@@ -50,9 +52,9 @@ Rights Reserved.
 			</rule>
 		</template>
 
-		<treecol style="width:20%" id="NameColumn" rdf:resource="http://home.netscape.com/NC-rdf#DisplayName"/>
-		<treecol style="width:21%" id="EmailColumn" rdf:resource="http://home.netscape.com/NC-rdf#PrimaryEmail"/>
-		<treecol style="width:20%" id="WorkPhoneColumn" rdf:resource="http://home.netscape.com/NC-rdf#WorkPhone"/>
+		<treecol style="width:1*" id="NameColumn" rdf:resource="http://home.netscape.com/NC-rdf#DisplayName"/>
+		<treecol style="width:1*" id="EmailColumn" rdf:resource="http://home.netscape.com/NC-rdf#PrimaryEmail"/>
+		<treecol style="width:1*" id="WorkPhoneColumn" rdf:resource="http://home.netscape.com/NC-rdf#WorkPhone"/>
 		
 		<treehead>
 			<treerow>