Index: openacs-4/packages/acs-authentication/lib/search.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-authentication/lib/search.tcl,v
diff -u -r1.5 -r1.6
--- openacs-4/packages/acs-authentication/lib/search.tcl	19 Jun 2015 18:07:53 -0000	1.5
+++ openacs-4/packages/acs-authentication/lib/search.tcl	26 Jun 2015 20:50:09 -0000	1.6
@@ -16,8 +16,8 @@
 
 } {
     {search_text ""}
-    {authority_id ""}
-    orderby:optional
+    {authority_id:naturalnum,notnull ""}
+    orderby:token,optional
 }
 
 set authority_options [auth::authority::get_authority_options]