diff -r 0a96e74e17a6 src/main/java/org/nuxeo/ecm/platform/shibboleth/web/UserSuggestionWithGroupTreeActionsBean.java
--- a/src/main/java/org/nuxeo/ecm/platform/shibboleth/web/UserSuggestionWithGroupTreeActionsBean.java	Wed Nov 10 17:52:46 2010 +0100
+++ b/src/main/java/org/nuxeo/ecm/platform/shibboleth/web/UserSuggestionWithGroupTreeActionsBean.java	Fri Nov 26 15:28:03 2010 +0100
@@ -82,7 +82,8 @@
     protected List<DocumentModel> getGroups() throws ClientException {
         try {
             Map<String, Serializable> filter = new HashMap<String, Serializable>();
-            filter.put(userManager.getGroupIdField(), "%");
+//            filter.put(userManager.getGroupIdField(), "%");
+            filter.put(userManager.getGroupIdField(), "");
             filter.put("__virtualGroup", false);
 
             // parameters must be serializable so copy keySet to HashSet