diff --git a/admin/inc/class.admin_customfields.inc.php b/admin/inc/class.admin_customfields.inc.php
index b194ffc986..eb7f2a74cc 100644
--- a/admin/inc/class.admin_customfields.inc.php
+++ b/admin/inc/class.admin_customfields.inc.php
@@ -282,7 +282,7 @@ class admin_customfields
 		);
 
 		// Allow extending app a change to change content before display
-		$readonlys = null;
+		if (!isset($readonlys)) $readonlys = [];
 		static::app_index($content, $sel_options, $readonlys, $preserve);
 
 		// Set app to admin to make sure actions are correctly loaded into admin
diff --git a/admin/templates/default/config.xet b/admin/templates/default/config.xet
index f08e5abdd2..c50e116b9c 100644
--- a/admin/templates/default/config.xet
+++ b/admin/templates/default/config.xet
@@ -32,7 +32,7 @@
 							<option value="account">{Username}@domain.com</option>
 							<option value="none">Do not generate EMail addresses</option>
 						</et2-select>
-						<et2-checkbox  label="Lowercase EMail addresses" id="newsettings[email_address_lowercase]" value="true"></et2-checkbox>
+						<et2-checkbox  label="Lowercase EMail addresses" id="newsettings[email_address_lowercase]"></et2-checkbox>
 					</et2-vbox>
 				</row>
 				<row>
diff --git a/admin/templates/default/customfield_edit.xet b/admin/templates/default/customfield_edit.xet
index e109c47168..5127f35c1b 100644
--- a/admin/templates/default/customfield_edit.xet
+++ b/admin/templates/default/customfield_edit.xet
@@ -37,7 +37,7 @@
 				</row-->
 				<row>
 					<et2-description  statustext="each value is a line like id[=label], or use @path to read options from a file in EGroupware directory" value="Options"></et2-description>
-					<et2-textarea  statustext="@statustext" id="cf_values" rows="5" cols="30" span="3" width="99%"></et2-textarea>
+					<et2-textarea  statustext="@statustext" id="cf_values" rows="5" size="30" span="3" width="99%"></et2-textarea>
 				</row>
 				<row>
 					<et2-description  value="Length"></et2-description>
diff --git a/admin/templates/default/customfields.xet b/admin/templates/default/customfields.xet
index 1f35c4c4ef..8d308969a2 100644
--- a/admin/templates/default/customfields.xet
+++ b/admin/templates/default/customfields.xet
@@ -27,7 +27,7 @@
 		</grid>
 	</template>
 	<template id="admin.customfields.fields" template="" lang="" group="0" version="1.9.001">
-		<grid readonly="true">
+		<grid>
 			<columns>
 				<column disabled="!@type2" width="50px"/>
 				<column width="30%"/>