diff --git a/modules/gui/qt4/components/info_panels.cpp b/modules/gui/qt4/components/info_panels.cpp
index 849c7cd..b670c80 100644
--- a/modules/gui/qt4/components/info_panels.cpp
+++ b/modules/gui/qt4/components/info_panels.cpp
@@ -572,11 +572,13 @@ void InputStatsPanel::update( input_item_t *p_item )
     assert( p_item );
     vlc_mutex_lock( &p_item->p_stats->lock );

+#undef sprintf
 #define UPDATE_INT( widget, calc... ) \
     { widget->setText( 1, QString::number( (qulonglong)calc ) ); }

 #define UPDATE_FLOAT( widget, format, calc... ) \
-    { QString str; widget->setText( 1 , str.sprintf( format, ## calc ) );  }
+    { char str[40]; snprintf(str, sizeof(str), format, ##calc); widget->setText(1, str); }
+    //{ QString str; widget->setText( 1 , str.sprintf( format, ## calc ) );  }

     UPDATE_INT( read_media_stat, (p_item->p_stats->i_read_bytes / 1024 ) );
     UPDATE_FLOAT( input_bitrate_stat,  "%6.0f", (float)(p_item->p_stats->f_input_bitrate *  8000  ));
diff --git a/modules/gui/qt4/components/simple_preferences.cpp b/modules/gui/qt4/components/simple_preferences.cpp
index b79dcb5..2c02133 100644
--- a/modules/gui/qt4/components/simple_preferences.cpp
+++ b/modules/gui/qt4/components/simple_preferences.cpp
@@ -887,7 +887,7 @@ void SPrefsPanel::assoDialog()

     if( S_OK == CoCreateInstance( &clsid_IApplication2,
                 NULL, CLSCTX_INPROC_SERVER,
-                &IID_IApplicationAssociationRegistrationUI,
+                IID_IApplicationAssociationRegistrationUI,
                 (void **)&p_appassoc) )
     {
         if(S_OK == p_appassoc->vt->LaunchAdvancedAssociationUI(p_appassoc, L"VLC" ) )
diff --git a/modules/gui/qt4/dialogs/bookmarks.cpp b/modules/gui/qt4/dialogs/bookmarks.cpp
index fa0ccd0..e02c0f4 100644
--- a/modules/gui/qt4/dialogs/bookmarks.cpp
+++ b/modules/gui/qt4/dialogs/bookmarks.cpp
@@ -130,8 +130,10 @@ void BookmarksDialog::update()
         int hour = total / (60*60);
         int min = (total - hour*60*60) / 60;
         int sec = total - hour*60*60 - min*60;
-        QString str;
-        row << str.sprintf("%02d:%02d:%02d", hour, min, sec );
+        char str[40];
+        snprintf(str, sizeof(str), "%02d:%02d:%02d", hour, min, sec );
+        //QString str;
+        row << str; //str.sprintf("%02d:%02d:%02d", hour, min, sec );
         QTreeWidgetItem *item = new QTreeWidgetItem( bookmarksList, row );
         item->setFlags( Qt::ItemIsSelectable | Qt::ItemIsEditable |
                         Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
diff --git a/modules/gui/qt4/menus.cpp b/modules/gui/qt4/menus.cpp
index 3c2b403..1ace3bf 100644
--- a/modules/gui/qt4/menus.cpp
+++ b/modules/gui/qt4/menus.cpp
@@ -1409,7 +1409,12 @@ int QVLCMenu::CreateChoicesMenu( QMenu *submenu, const char *psz_var,
             case VLC_VAR_FLOAT:
                 var_Get( p_object, psz_var, &val );
                 if( CURTEXT ) menutext = qfu( CURTEXT );
-                else menutext.sprintf( "%.2f", CURVAL.f_float );
+                else {
+                    char str[40];
+                    snprintf(str, sizeof(str), "%.2f", CURVAL.f_float);
+                    menutext = qfu(str);
+                }
+                //else menutext.sprintf( "%.2f", CURVAL.f_float );
                 CreateAndConnect( submenu, psz_var, menutext, "", RADIO_OR_COMMAND,
                         p_object, CURVAL, i_type,
                         CURVAL.f_float == val.f_float );