diff -r efad396abee9 -r ce5fbd98370f QTfrontend/net/newnetclient.cpp
--- a/QTfrontend/net/newnetclient.cpp	Thu Feb 23 23:13:48 2012 +0400
+++ b/QTfrontend/net/newnetclient.cpp	Fri Feb 24 23:49:31 2012 +0400
@@ -254,6 +254,10 @@
         {
             // TODO: Warn user, disconnect
             qWarning() << "Server too old";
+            RawSendNet(QString("QUIT%1%2").arg(delimeter).arg("Server too old"));
+            Disconnect();
+            emit disconnected(tr("The server is too old. Disconnecting now."));
+            return;
         }
 
         RawSendNet(QString("NICK%1%2").arg(delimeter).arg(mynick));