Index: deluge/ui/client.py
===================================================================
--- deluge/ui/client.py	(revision 2816)
+++ deluge/ui/client.py	(working copy)
@@ -83,22 +83,30 @@
     def do_multicall(self, block=False):
         if len(self._callbacks) == 0:
             return True
+
+        def invoke_callbacks(callbacks, value):
+            try:
+                for callback in callbacks:
+                    if block == False:
+                        gobject.idle_add(callback, value)
+                    else:
+                        callback(value)
+            except:
+                pass
         
         if self._multi is not None and self._core is not None:
             try:
                 try:
                     for i, ret in enumerate(self._multi()):
-                        try:
-                            for callback in self._callbacks[i]:
-                                if block == False:
-                                    gobject.idle_add(callback, ret)
-                                else:
-                                    callback(ret)
-                        except:
-                            pass
+                        invoke_callbacks(self._callbacks[i], ret)
                 except socket.error, e:
                     log.warning("Could not contact daemon: %s", e)
                     self.set_core_uri(None)
+                except deluge.xmlrpclib.Fault, e:
+                    try:
+                        deluge.error.from_xmlrpc_fault(e)
+                    except deluge.error.DelugeError, e:
+                        invoke_callbacks(self._callbacks[i], e)
             finally:                        
                 self._callbacks = []