diff --git a/retroshare-gui/src/gui/ForumsDialog.cpp b/retroshare-gui/src/gui/ForumsDialog.cpp
index b2e1305dc..fa3a45c46 100644
--- a/retroshare-gui/src/gui/ForumsDialog.cpp
+++ b/retroshare-gui/src/gui/ForumsDialog.cpp
@@ -241,6 +241,9 @@ void ForumsDialog::togglefileview()
 
 void ForumsDialog::checkUpdate()
 {
+	if(!isVisible())
+		return ;
+
 	std::list<std::string> forumIds;
 	std::list<std::string>::iterator it;
 	if (!rsForums)
diff --git a/retroshare-gui/src/gui/MainWindow.cpp b/retroshare-gui/src/gui/MainWindow.cpp
index 375840973..969b4484b 100644
--- a/retroshare-gui/src/gui/MainWindow.cpp
+++ b/retroshare-gui/src/gui/MainWindow.cpp
@@ -339,6 +339,8 @@ MainWindow::MainWindow(QWidget* parent, Qt::WFlags flags)
 
 void MainWindow::updateStatus()
 {
+	if(!isVisible())
+		return ;
 	
 	if (ratesstatus)
     	ratesstatus->getRatesStatus();
@@ -508,6 +510,8 @@ void MainWindow::doQuit()
 
 		if ((QMessageBox::question(this, tr("Really quit ? "),queryWrn,QMessageBox::Ok|QMessageBox::No, QMessageBox::Ok))== QMessageBox::Ok)
 		{
+			delete rsicontrol ;
+			delete rsiface ;
       qApp->quit();
 		}
 		else
diff --git a/retroshare-gui/src/gui/NetworkDialog.cpp b/retroshare-gui/src/gui/NetworkDialog.cpp
index 56ce55a61..e3d250b9f 100644
--- a/retroshare-gui/src/gui/NetworkDialog.cpp
+++ b/retroshare-gui/src/gui/NetworkDialog.cpp
@@ -692,6 +692,9 @@ void NetworkDialog::getNetworkStatus()
 
 void NetworkDialog::updateNetworkStatus()
 {
+	if(!isVisible())
+		return ;
+
     rsiface->lockData(); /* Lock Interface */
 
     /* now the extra bit .... switch on check boxes */
diff --git a/retroshare-gui/src/gui/PeersDialog.cpp b/retroshare-gui/src/gui/PeersDialog.cpp
index b39895e8b..ab08a95c5 100644
--- a/retroshare-gui/src/gui/PeersDialog.cpp
+++ b/retroshare-gui/src/gui/PeersDialog.cpp
@@ -226,6 +226,9 @@ void PeersDialog::peertreeWidgetCostumPopupMenu( QPoint point )
 /* get the list of peers from the RsIface.  */
 void  PeersDialog::insertPeers()
 {
+	if(!isVisible())
+		return ;
+
 	std::list<std::string> peers;
 	std::list<std::string>::iterator it;