Index: skins/colibri/src/main/resources/colibri/colibri.css
===================================================================
--- skins/colibri/src/main/resources/colibri/colibri.css	(revision 23114)
+++ skins/colibri/src/main/resources/colibri/colibri.css	(working copy)
@@ -4244,6 +4244,10 @@
   color: $theme.textPrimaryColor ;
 }
 
+#userstable td, #groupstable td, #usersandgroupstable td{
+  border: 0; /* IE6 */
+}
+
 /**********************************************************************************************/
 /** SEARCH **/
 #body #globalsearch input {