Index: program/js/app.js
===================================================================
--- program/js/app.js	(revision af3c045ecf4865361981f4c9aa392dfe1f93ac90)
+++ program/js/app.js	(revision c0c0c03d97c7d7d7157c34c17f2fcddbb2533d32)
@@ -2387,6 +2387,8 @@
     }
 
+    add_url += '&_uid='+this.uids_to_list(a_uids);
+
     // send request to server
-    this.http_post('copy', '_uid='+a_uids.join(',')+'&_mbox='+urlencode(this.env.mailbox)+add_url, lock);
+    this.http_post('copy', '_mbox='+urlencode(this.env.mailbox)+add_url, lock);
   };
 
@@ -2401,6 +2403,6 @@
       return;
 
-    var lock = false;
-    var add_url = '&_target_mbox='+urlencode(mbox)+'&_from='+(this.env.action ? this.env.action : '');
+    var lock = false,
+      add_url = '&_target_mbox='+urlencode(mbox)+'&_from='+(this.env.action ? this.env.action : '');
 
     // show wait message