https://github.com/QupZilla/qupzilla/commit/37da53731c6c92b4ece0bdb6e264472adf2f6d9f
diff -ru QupZilla-1.3.5.org/src/lib/adblock/adblockicon.cpp QupZilla-1.3.5/src/lib/adblock/adblockicon.cpp
--- QupZilla-1.3.5.org/src/lib/adblock/adblockicon.cpp	2012-12-11 19:20:32.094777090 +0100
+++ QupZilla-1.3.5/src/lib/adblock/adblockicon.cpp	2012-12-11 19:25:29.891932103 +0100
@@ -111,7 +111,7 @@
     menu->addAction(tr("Show AdBlock &Settings"), manager, SLOT(showDialog()));
     menu->addSeparator();
 
-    if (!pageUrl.isEmpty()) {
+    if (!pageUrl.isEmpty() && m_enabled) {
         const QString &host = page->url().host().contains(QLatin1String("www.")) ? pageUrl.host().mid(4) : pageUrl.host();
         const QString &hostFilter = QString("@@||%1^$document").arg(host);
         const QString &pageFilter = QString("@@|%1|$document").arg(pageUrl.toString());

https://github.com/QupZilla/qupzilla/commit/7eaa2d11e057cc28b22cb5c45f6285c6a350fa67
and
https://github.com/QupZilla/qupzilla/issues/652
diff -ru QupZilla-1.3.5.org/src/lib/history/historymodel.cpp QupZilla-1.3.5/src/lib/history/historymodel.cpp
--- QupZilla-1.3.5.org/src/lib/history/historymodel.cpp	2012-12-11 19:20:32.085777083 +0100
+++ QupZilla-1.3.5/src/lib/history/historymodel.cpp	2012-12-11 19:24:17.013895571 +0100
@@ -264,6 +264,7 @@
     beginResetModel();
 
     delete m_rootItem;
+    m_todayItem = 0;
     m_rootItem = new HistoryItem(0);
 
     init();
@@ -448,12 +449,15 @@
     if (!query.next()) {
         return;
     }
+    
+    const qint64 &minTimestamp = query.value(0).toLongLong();
+    if (minTimestamp <= 0) {
+        return;
+    }
 
     const QDate &today = QDate::currentDate();
     const QDate &week = today.addDays(1 - today.dayOfWeek());
     const QDate &month = QDate(today.year(), today.month(), 1);
-
-    const qint64 &minTimestamp = query.value(0).toLongLong();
     const qint64 &currentTimestamp = QDateTime::currentMSecsSinceEpoch();
 
     qint64 timestamp = currentTimestamp;

backport of https://github.com/QupZilla/qupzilla/commit/d08ec28d70934fa82d51efceb1a422d96c6812f6
diff -ru QupZilla-1.3.5.org/src/lib/webview/tabbar.cpp QupZilla-1.3.5/src/lib/webview/tabbar.cpp
--- QupZilla-1.3.5.org/src/lib/webview/tabbar.cpp	2012-12-11 19:20:32.092777090 +0100
+++ QupZilla-1.3.5/src/lib/webview/tabbar.cpp	2012-12-11 19:27:23.110991048 +0100
@@ -647,15 +647,6 @@
     QAbstractButton::leaveEvent(event);
 }
 
-void CloseButton::hideEvent(QHideEvent* event)
-{
-    QAbstractButton::hideEvent(event);
-
-    if (!isVisible()) {
-        deleteLater();
-    }
-}
-
 void CloseButton::paintEvent(QPaintEvent*)
 {
     QPainter p(this);
diff -ru QupZilla-1.3.5.org/src/lib/webview/tabbar.h QupZilla-1.3.5/src/lib/webview/tabbar.h
--- QupZilla-1.3.5.org/src/lib/webview/tabbar.h	2012-12-11 19:20:32.093777090 +0100
+++ QupZilla-1.3.5/src/lib/webview/tabbar.h	2012-12-11 19:27:32.539995733 +0100
@@ -128,7 +128,6 @@
 
     void enterEvent(QEvent* event);
     void leaveEvent(QEvent* event);
-    void hideEvent(QHideEvent* event);
     void paintEvent(QPaintEvent* event);
 };