Crash report

The first line is in Swedish, I'll try to translate it for you, it basically says...

System.ArgumentException: The object has already been added/created. The key in (wordlist/array?): #rtp_cc_3572177. Key that is being added: #rtp_cc_3572177.

   vid System.Collections.Hashtable.Insert(Object key, Object nvalue, Boolean add)

   vid System.Collections.Hashtable.Add(Object key, Object value)

   vid System.Collections.Specialized.StringDictionary.Add(String key, String value)

   vid Meebey.SmartIrc4net.IrcClient._StoreChannelsToRejoin()

   vid Meebey.SmartIrc4net.IrcClient._OnDisconnected(Object sender, EventArgs e)

   vid System.EventHandler.Invoke(Object sender, EventArgs e)

   vid Meebey.SmartIrc4net.IrcConnection.Disconnect()

   vid ReadyToPlay.Forms.ReadyToPlayWindow.CloseConnections()

   vid ReadyToPlay.Forms.ReadyToPlayWindow.Window_Closing(Object sender, CancelEventArgs e)

   vid System.Windows.Window.OnClosing(CancelEventArgs e)

   vid System.Windows.Window.WmClose()

   vid System.Windows.Window.WindowFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

   vid System.Windows.Interop.HwndSource.PublicHooksFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

   vid MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

   vid MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)

   vid System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)

   vid System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)