=== program/steps/mail/func.inc
==================================================================
--- program/steps/mail/func.inc	(revision 1884)
+++ program/steps/mail/func.inc	(local)
@@ -457,7 +457,7 @@
   $OUTPUT->add_gui_object('quotadisplay', $attrib['id']);
 
   // allow the following attributes to be added to the <span> tag
-  $attrib_str = create_attrib_string($attrib, array('style', 'class', 'id', 'display'));
+  $attrib_str = create_attrib_string($attrib, array('style', 'class', 'id'));
 
   $out = '<span' . $attrib_str . '>';
   $out .= rcmail_quota_content(NULL, $attrib);