Index: trunk/admin/listview/listview.js
===================================================================
diff -u -r767 -r1566
--- trunk/admin/listview/listview.js	(.../listview.js)	(revision 767)
+++ trunk/admin/listview/listview.js	(.../listview.js)	(revision 1566)
@@ -202,10 +202,15 @@
 {
 	var full_env = env;
 	if( HasParam(env_str) ) full_env += env_str;
+	
 	if(full_env.substr(0,3) != "env") full_env = 'env='+full_env;		
+	
     var URLPrefix = '';
     if( targetURL.substring(0, rootURL.length) != rootURL ) URLPrefix = rootURL;
-    var loc = URLPrefix + targetURL + '?' + full_env;
+    var loc = URLPrefix + targetURL;
+
+    if( !loc.match('(.*)?env=(.*)') ) loc += '?' + full_env;
+    
     document.location = loc;
 }