diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
index 5fc1e9a..391eaa7 100644
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -329,7 +329,7 @@ void MainWindow::onMenuPrintPreview()
       subWindow->show();
    }
    catch( const QString &err ) {
-      QMessageBox::critical( this, tr( "Error" ), err );
+      QMessageBox::critical( this, tr( "Error on print preview" ), err );
    }
 }
 
@@ -339,7 +339,12 @@ void MainWindow::onMenuPrint()
    if( !cdscene )
       return;
 
-   QDialogProgress::exec( this, cdscene );
+   try {
+      QDialogProgress::exec( this, cdscene );
+   }
+   catch( const QString &err ) {
+      QMessageBox::critical( this, tr( "Error on print" ), err );
+   }
 }
 
 void MainWindow::onMenuAbout()
diff --git a/src/qdialogprogress.cpp b/src/qdialogprogress.cpp
index b0f843e..4f6e485 100644
--- a/src/qdialogprogress.cpp
+++ b/src/qdialogprogress.cpp
@@ -68,7 +68,6 @@ bool QDialogProgress::exec( QWidget *parent, QCDScene *scene )
    if( !drive )
       return false;
 
-   QLightScribe *scribe = QLightScribe::instance();
    QDialogProgress dialog( parent, drive );
    dialog.setWindowTitle( tr( "Printing: " ) + scene->name() );
 
@@ -111,7 +110,7 @@ void QDialogProgress::onLabelProgress( int current, int final )
 
    if( current && final / double( current ) < 10.0 ) {
       int elapsed = m_start->elapsed();
-      int estimate = double( elapsed ) / current * final;
+      int estimate = int( double( elapsed ) / current * final );
       m_ui->timeEstimated->setTime( QTime().addMSecs( estimate ) );
    }
 }
diff --git a/src/qlightscribe.cpp b/src/qlightscribe.cpp
index d5b571f..dbd6718 100644
--- a/src/qlightscribe.cpp
+++ b/src/qlightscribe.cpp
@@ -125,7 +125,7 @@ QPixmap QLightDrive::preview( const PrintParameters &params, QCDScene *scene, co
    printScene( scene, array );
    QDBusReply<QString> reply = m_drivePrx->preview( params, array, size );
    if( !reply.isValid() )
-      throw reply.error().message();
+      throw QString( "DBus error: (%1) %2" ).arg( reply.error().name(), reply.error().message() );
 
    QString fname = reply.value();
    QPixmap pixmap( fname );
@@ -139,7 +139,7 @@ void QLightDrive::print( const PrintParameters &params, QCDScene *scene ) throw(
    printScene( scene, array );
    QDBusReply<void> reply = m_drivePrx->print( params, array );
    if( !reply.isValid() )
-      throw reply.error().message();
+      throw QString( "DBus error: (%1) %2" ).arg( reply.error().name(), reply.error().message() );
 }
 
 void QLightDrive::abort()