Index: branches/5.2.x/core/admin_templates/groups/groups_edit_permissions.tpl
===================================================================
diff -u -N -r15267 -r16552
--- branches/5.2.x/core/admin_templates/groups/groups_edit_permissions.tpl	(.../groups_edit_permissions.tpl)	(revision 15267)
+++ branches/5.2.x/core/admin_templates/groups/groups_edit_permissions.tpl	(.../groups_edit_permissions.tpl)	(revision 16552)
@@ -129,12 +129,13 @@
 		while($i < $permissions.length) {
 			$test_perm = '_cb_g-perm[' + $rets[1] + '][' + $permissions[$i] + ']';
 			$test_perm = document.getElementById($test_perm);
-			if ($test_perm) {
-				$test_perm.checked = $source_perm.checked;
-				update_checkbox($test_perm, document.getElementById('g-perm[' + $rets[1] + '][' + $permissions[$i] + ']'));
+
+			if ( $test_perm && $test_perm.checked !== $source_perm.checked ) {
+				$($test_perm).prop('checked', $source_perm.checked).change();
 			}
+
 			$i++;
 		}
 	}
 </script>
-<inp2:m_include t="incs/footer"/>
\ No newline at end of file
+<inp2:m_include t="incs/footer"/>